7 Essential LCHF Swaps

Living the LCHF lifestyle is not as hard as you might think. Once you’re organised, it’s a matter of making swaps from your existing foods to those that are LCHF-friendly to make it work. Today I bring you my top 7 essential LCHF swaps that are vegetable-based.

But before we get into the specifics, it’s worth understanding why these swaps work — and where they sit within the broader low-carb, high-fat (LCHF) framework that we explore in the What The Fat? books. The core principle is simple: reduce the refined and starchy carbohydrates that drive blood glucose and insulin, and replace them with whole-food fats, protein and non-starchy vegetables.

The swaps below are not about deprivation. They are about keeping the experience of a meal — the texture, the mouthfeel, the ritual of a burger or a bowl of spaghetti — while changing what’s doing the heavy lifting nutritionally.

Key Takeaways

• The best LCHF swaps preserve the function of the original food — the crunch, the bulk, the vehicle for sauce — rather than trying to replicate it exactly.
• Non-starchy vegetables like courgette, cauliflower, cucumber and mushrooms are the workhorses of these swaps because they are low in carbohydrate and high in volume, water and micronutrients.
• A spiraliser, a food processor or a simple julienne peeler is the only specialist equipment you really need to get started.
• Not every swap is a strict carb-lowering move — sweet potato “toast” is a good example — but it can still be a better choice than refined bread.
• Batch-cooking and prepping these bases ahead of time is what makes the lifestyle sustainable on busy weeknights.

Why These Swaps Work: The LCHF Logic

The LCHF approach — popularised in New Zealand by Dr Caryn Zinn, Professor Grant Schofield and chef Craig Rodger in What The Fat? — rests on a straightforward metabolic idea. When you lower dietary carbohydrate, you lower the demand on insulin, stabilise blood glucose, and encourage the body to draw on fat for fuel.

For people managing type 2 diabetes, insulin resistance or excess weight, that shift can be genuinely therapeutic. For those managing high cholesterol, the emphasis on whole-food fats (olive oil, butter, coconut oil, nuts, oily fish) rather than refined carbohydrate and industrial seed oils matters too. For a closer look at the metabolic side, this guide on how to lower insulin resistance naturally explains the changes in more detail.

The problem most people hit is not the principle — it’s the plate. A curry without rice feels incomplete. A bolognese without spaghetti feels like a sauce looking for a home. These swaps solve that problem by giving you a low-carb stand-in that plays the same role on the plate.

A useful way to think about it is by function:

• Bulk and absorbency — rice, couscous and noodles soak up sauce. Cauliflower and courgette do the same job.
• Structure and grip — buns and toast hold toppings. Mushrooms and sweet potato can do this.
• Crunch and delivery — crackers are really just a crunchy vehicle for cheese, pâté or dip. Cucumber is a better one.

Once you see swaps in terms of function, you stop looking for perfect replicas and start finding what actually works in your kitchen.

Swap Out Noodles for Zoodles

The courgette — or zucchini, depending on which side of the Tasman you’re on — is a genuinely versatile vegetable. Invest in a spiraliser (or a julienne peeler) to make true spaghetti-like noodles that are nutrient-rich and delicious. I like to use them not only as a pasta substitute but also as a little mound on my plate, on which I rest my protein (fish, chicken or meat).

A few practical notes that make a real difference:

• Salt and drain. Courgette is roughly 90%+ water. After spiralising, toss the noodles with a pinch of salt in a colander and let them sit for 10–15 minutes, then squeeze gently. This stops your “pasta” turning into soup.
• Cook hot and fast. A quick toss in a hot pan with olive oil or butter for a minute or two keeps them firm. Overcooking turns them to mush.
• Or don’t cook at all. For a cold dish, raw zoodles dressed with pesto or a good vinaigrette are excellent and hold their bite.
• Watch the portion. Courgette is low-carb, but it’s not zero-carb. A large bowl of zoodles still contributes some carbohydrate — usually a modest amount, but worth tracking if you’re managing blood glucose closely.

If you don’t own a spiraliser, a julienne peeler gives you ribbons that work just as well for most dishes. A mandoline with a julienne blade is another option, though it demands more care with your fingers.

Swap Out Rice for “Cauli-Rice”

Now this is a classic. If you haven’t already tried it, it’s a must. Place the cauliflower in a blender, raw, and blitz until fine. Then put it in a pan with cooking fat (butter / coconut oil / olive oil), salt and pepper and cook until the consistency suits. I like mine slightly crunchy and I usually use it not only as my “rice” substitute for curry and rice, but also as my spaghetti substitute for my spag bol — it’s just about finding out what works for you and your family.

Getting cauli-rice right comes down to managing moisture:

• Pulse, don’t purée. Short bursts in the food processor give you rice-like grains. Continuous blending gives you cauliflower paste.
• Dry it out. If your cauliflower is very fresh and wet, spread the raw “rice” on a clean tea towel and pat it dry before cooking.
• Cook in fat, not water. Fat carries flavour and helps the grains separate rather than steam into a mash.
• Roast it for a nuttier result. Spread on a tray with oil and roast at high heat for a deeper, drier texture that holds up beautifully under a curry.

Cauliflower is a member of the Brassica genus — the same family as broccoli, cabbage and kale — and like its relatives it brings fibre and a range of micronutrients to the plate. It’s also remarkably neutral in flavour, which is exactly why it works as a canvas for whatever you cook with it.

Swap Out Couscous for “Cauli-Couscous”

This is essentially the same as the above, but just add turmeric when you cook it so it goes yellow (make sure to add black pepper to enhance its bioavailability as a spice-based anti-inflammatory agent). This is a great substitute for carb-heavy couscous. I enjoy it with Moroccan spice flavours in a traditional Moroccan-couscous dish (with a difference) and also as a “cauli”-couscous salad (great for leftovers).

The turmeric-and-black-pepper point is worth dwelling on. Curcumin — the active compound in turmeric — is poorly absorbed on its own. Piperine, the compound that gives black pepper its bite, is well documented as enhancing its absorption. This is a small but genuinely useful piece of kitchen chemistry: if you’re going to use turmeric for its potential anti-inflammatory properties, always pair it with a grind of black pepper and ideally some fat, since curcumin is fat-soluble.

For the Moroccan version, think cumin, coriander, cinnamon, ginger, a little paprika and a squeeze of lemon. Toss the cooked cauli-couscous through and finish with fresh herbs, toasted almonds and a good olive oil. It’s excellent warm, and arguably even better cold the next day as a salad — which makes it a strong candidate for batch cooking.

Swap Out Burger Buns for Portobello Mushrooms

Homemade burgers have never been healthier, and the kids will love them. To make my mushrooms uber-tasty, I first fry up some butter and garlic, brush the mix onto the mushrooms (top and bottom), and then grill them to keep them soft and moist. There is nothing wrong with having them a little firmer to hold the inners of the burger either.

Some practical guidance on choosing and handling mushrooms:

• Size matters. You want caps wide enough to hold a patty. Large flat portobellos (also sold as “field” or “flat” mushrooms) are ideal.
• Remove the stem and gills if you like. The gills can release dark liquid; scraping them out with a spoon gives a cleaner result, though it’s optional.
• Grill, don’t fry, for the finish. The garlic-butter baste plus a hot grill gives you a juicy, savoury “bun” that doesn’t go soggy.
• Double up if needed. Two mushrooms per burger — one top, one bottom — hold together better than a single cap folded over.

Mushrooms bring umami, which is part of why they work so well here: they make the whole burger taste meatier rather than feeling like a compromise. For a lower-mess option, you can also serve the patty on a single large grilled mushroom, open-faced, with a knife and fork.

Swap Out Spaghetti for Spaghetti Squash

Another pasta alternative. Spaghetti squash is just delicious and is now even promoted in the supermarket as a pasta alternative (the message is getting through, people!). It’s so easy to cook and can feed a lot of hungry mouths as it goes far. Just pop it in the oven with some butter and spices, and after 45 minutes, it’s all yours to string into spaghetti-like strips.

A few refinements:

• Halve it lengthways and scoop out the seeds before roasting — the strands run around the circumference, so lengthways halving gives you the longest “spaghetti.”
• Roast cut-side down on a lined tray for a drier, more pasta-like texture, or cut-side up with butter in the cavity for a richer one.
• Fork it out. Once cool enough to handle, drag a fork through the flesh and the strands separate naturally.
• Drain if needed. Spaghetti squash can be watery; letting the strands sit in a colander for a few minutes helps.

Spaghetti squash is a winter squash (Cucurbita pepo), the same species as many courgettes and pumpkins. It’s lower in carbohydrate than pasta and brings a mild, slightly sweet flavour that takes sauce beautifully.

Swap Out Crackers for Crunchy Cucumbers

I find most people just crave the crunch from crackers. What better way to get that crunch than from nutrient-rich cucumber (English / Telegraph). Top with any combination of cheese, basil pesto, baby tomatoes, smoked salmon, mashed avocado or pate and enjoy the decadence.

This is arguably the easiest swap of the lot, because it requires no cooking at all. A few ways to make it work harder:

• Slice thick. Thin slices go limp. Cut rounds about half a centimetre thick so they can carry a topping without collapsing.
• Pat dry. Cucumber holds a lot of water; a quick blot with paper towel stops toppings sliding off.
• Think in “boards.” A platter of cucumber rounds with different toppings is a brilliant low-carb alternative to a cheese-and-cracker board for entertaining.
• Other crunchy vehicles. Celery sticks, radishes, capsicum strips and endive leaves all do the same job if you want variety.

The point here isn’t that cucumber is a perfect cracker. It’s that the craving is usually for crunch and for the topping — and cucumber delivers both without the refined carbohydrate.

Swap Out Toast for Toasted Kumara (Sweet Potato)

That’s right, you are reading correctly, toasted kumara. While this might not be a carb-lowering tip, it’s still healthier than bread. Try sweet potato (or kumara) toast. Just pop a piece (bread-width) in the toaster — you might need to toast a few times to get it to the consistency you like. Serve with any combination of toppings as above.

I want to be honest about this one, because it’s the exception in the list. Kumara is a starchy vegetable and it does contain meaningful carbohydrate. So this is not a swap you’d lean on heavily if your goal is strict blood-glucose control or nutritional ketosis. It’s better understood as a transitional swap — a stepping stone for people moving away from refined bread, or an occasional option for those who are metabolically healthy and simply want a better-quality carbohydrate source.

If you do use it:

• Slice it thin so it toasts through rather than burning on the outside and staying raw in the middle.
• Cook it ahead. Pre-roasting or steaming slices, then finishing them in the toaster, gives a much better result.
• Pair it with fat and protein. Toppings like avocado, eggs, cheese or nut butter slow the glucose response compared with eating it bare.
• Measure your response. If you wear a continuous glucose monitor or test your blood glucose, this is exactly the kind of food worth testing personally rather than assuming.

For a genuinely low-carb “toast” alternative, consider thin slices of grilled halloumi, large baked cheese crisps, or even thin omelette “wraps” — all of which hold toppings well.

Choosing Your Swaps: A Quick Comparison

Not all swaps are equal. Here’s a rough guide to how they compare on the dimensions that matter most.

Swap	Carb impact	Effort	Best for	Watch out for
Zoodles (courgette)	Low	Low–medium	Pasta dishes, cold salads	Wateriness — salt and drain
Cauli-rice	Low	Medium	Curry, stir-fries, spag bol	Over-blending into paste
Cauli-couscous	Low	Medium	Moroccan dishes, cold salads	Needs strong seasoning
Portobello buns	Low	Low	Burgers, sandwiches	Size and structural strength
Spaghetti squash	Low–moderate	Medium	Pasta bakes, big family meals	Can be watery
Cucumber rounds	Very low	Very low	Snacking, entertaining	Goes limp if sliced thin
Kumara toast	Moderate–high	Low	Transitioning off bread	Not suitable for strict low-carb

Use this as a starting point, not a rulebook. The right swap for you depends on your metabolic goals, your cooking confidence and — crucially — what your family will actually eat.

Making It Stick: Practical Tips

The swaps themselves are easy. The habit is the hard part. A few things that help:

• Prep in batches. Blitz a whole cauliflower into rice and store it raw in the fridge for the week. Spiralise several courgettes at once.
• Keep frozen backups. Frozen cauliflower rice is widely available and a genuine lifesaver on a chaotic Tuesday.
• Invest once. A decent spiraliser and a food processor will pay for themselves many times over.
• Don’t fight the craving — redirect it. If you want crunch, give yourself crunch. If you want something to mop up sauce, give yourself something to mop up sauce.
• Involve the household. The swaps that survive are the ones everyone at the table accepts. Get the kids spiralising and they’ll eat the results.

If you’re managing a clinical condition — type 2 diabetes, insulin resistance or high cholesterol — it’s worth working with your GP or a registered dietitian rather than going it alone. Organisations such as Diabetes New Zealand and the British Dietetic Association publish guidance for the public, and the Dietitians Australia site is a useful reference for readers across the Tasman. For the underlying biochemistry, the Wikipedia entry on low-carbohydrate diets is a reasonable starting point, though as always, primary sources and your own clinical team are better.

So there you have it, some ideas to make sure your LCHF lifestyle is ticking over nicely. Enjoy!

What are healthy LCHF alternatives to sugar?

Stevia, sucralose, erythritol, xylitol, monk fruit, and yacon syrup can easily fit into a low carb or ketogenic diet. Stevia is a natural sweetener derived from the Stevia rebaudiana plant that contains little to no calories or carbs.

Sugar alcohols, also known as polyols, include erythritol and xylitol. Sucralose is an artificial sweetener that is not metabolized, so it provides no calories or carbs. These sweeteners can be used to sweeten drinks, baked goods, sauces, and dressings while reducing sugar consumption.

Source: healthline.com

What are LCHF-friendly alternatives to flour in baking?

Several low-carb, high-fat flours can replace wheat flour in baking, including almond flour, coconut flour, flaxseed meal, chia flour, soy flour, lupin flour, oat fiber, and pork rind dust. Almond flour works as a 1-to-1 substitute for wheat flour, while coconut flour absorbs lots of liquid and is best in recipes developed for it. Flaxseed meal has 0.5 net carbs per ¼ cup, and chia flour is made from ground chia seeds.

Source: healthline.com

How to replace sugary drinks with LCHF beverages?

Replace sugary drinks with low-carb, high-fat options such as water, sparkling water, coffee, unsweetened tea, and diet soda. Water is perfect and zero carb, as are coffee and tea without sugar. Sparkling water provides zero carb and zero calorie flavor. Diet soda is permitted as long as you are not overdoing it. Avoid non-diet soda, sports and energy drinks, vitamin water, hot chocolate, mocha, and fruit juices, which are high in sugar and carbs.

Source: atkins.com

Frequently Asked Questions

Do I need a spiraliser to make zoodles?

No. A julienne peeler will give you ribbons that work well in most dishes, and a mandoline with a julienne blade is another option. A spiraliser simply makes the process faster and produces longer, more spaghetti-like strands. If you’re going to eat zoodles regularly, it’s a worthwhile one-off purchase.

Is cauliflower rice actually low in carbohydrate?

Yes — cauliflower is a non-starchy vegetable and is very low in carbohydrate compared with rice. That’s precisely why it works as a swap. Just remember that any added sauces or toppings contribute their own carbohydrate, so the total dish is what matters.

Why add black pepper to turmeric?

Black pepper contains piperine, which is well documented as enhancing the absorption of curcumin, the active compound in turmeric. Since curcumin is also fat-soluble, pairing turmeric with both black pepper and a fat source — butter, coconut oil or olive oil — gives you the best chance of actually benefiting from it.

Is sweet potato toast really LCHF?

Not strictly. Kumara and sweet potato are starchy vegetables and contain meaningful carbohydrate, so this swap is better suited to people transitioning away from refined bread or those who are metabolically healthy. If your goal is strict blood-glucose control or nutritional ketosis, choose a genuinely low-carb base instead.

Can I prepare these swaps in advance?

Absolutely, and it’s one of the best ways to make the lifestyle sustainable. Cauli-rice and cauli-couscous keep well in the fridge for several days and are excellent cold as salads. Spiralised courgette is best used within a day or two, and frozen cauliflower rice is a reliable backup for busy weeks.

Are these swaps suitable for people with type 2 diabetes?

They can be very helpful, since they replace high-carbohydrate staples with lower-carbohydrate vegetables. However, individual responses vary, and if you take medication — particularly insulin or sulfonylureas — changing your carbohydrate intake can affect your requirements. Speak with your GP or dietitian before making significant changes.