The question comes up the moment you want to bake anything: what is the best low carb flour, and which flour is keto-friendly? It was one of the first things that stumped me, so here is the plain version I wish I had found. Ordinary wheat flour is roughly three-quarters carbohydrate, so a single cup carries about ninety grams and puts you well over a day’s keto budget on its own. The good news is that a small family of low carb flour options, milled from nuts, seeds and fibre, does the job at a fraction of the carbs. This is the plain keto flour guide to which ones are genuinely low-carb, how they compare, and what each is worth using for. If rice is the swap you miss, keto rice alternatives does the same job for the side of the plate.
Newsletter
Get keto tips in your inbox
Practical, evidence-minded notes on keto and low-carb living, with a Brussels slant. New posts and the odd useful tip, no fluff.
Free. Unsubscribe any time.
What makes a flour keto-friendly
A keto-friendly flour is simply one low enough in net carbs that a normal amount fits your daily limit. Net carbs are total carbohydrate minus the fibre your body does not absorb, and it is the figure that matters here rather than total carbs, because several of these flours are extremely high in fibre. If you want the full method, how to calculate net carbs walks through it.
Two things separate the keto flours from the rest. They are milled from nuts, seeds or isolated fibre rather than grain, so they carry little starch. And none of them contains gluten, which is why they behave differently in a bowl and why a straight swap for wheat rarely works. For how they actually perform in a recipe, the companion guide to keto baking flours covers texture, ratios and binders in detail. This piece is about the numbers and the shortlist.
The low carb flours compared
Figures are net carbs per 100g and vary a little by brand and grind, so treat them as a guide and check your packet. A hundred grams is a lot of flour, so per-serving carbs are usually much smaller.
| Flour | Net carbs / 100g | Best use | Notes |
|---|---|---|---|
| Almond flour | ~10g | Muffins, cookies, cakes, coatings | The everyday workhorse; mild, tender crumb, high in fat |
| Coconut flour | ~20g | Cakes, pancakes, savoury loaves | Very absorbent; use a quarter of the volume and more eggs |
| Ground flaxseed | ~2g | Binder, flax “egg”, seeded bread | Almost all fibre and fat; adds structure |
| Lupin flour | ~10g | Blended into almond flour for bread | High protein, low net carb; bitter alone, use as support |
| Sunflower seed flour | ~12g | Nut-free swap for almond flour | Similar ratio to almond; can react with raising agents |
| Sesame flour | ~10g | Nut-free baking, flatbreads | Nutty, works like a coarse almond flour |
| Psyllium husk | ~2g | Bread binder for chew and lift | Mostly fibre; a spoonful gives dough stretch |
| Peanut flour (defatted) | ~13g | Flavour and protein in bakes | Strong peanut taste; use in small amounts |
| Wheat flour (for comparison) | ~70g | Not keto | Listed only to show the gap |
The short answer to the common questions
Is almond flour keto? Yes. At roughly ten grams of net carbs per hundred, and far less in a typical bake, almond flour is the default keto flour and the one to buy first; the short answer to is almond flour keto covers it in full.
Is coconut flour keto? Yes, though it reads higher at around twenty grams per hundred. Because you use so little of it, a slice usually lands very low in carbs. It is thirsty and unforgiving, so follow a recipe written for it.
What is the lowest-carb flour? Ground flaxseed and psyllium husk are almost pure fibre, so their net carbs are tiny. They behave as binders rather than main flours, but they carry the least carbohydrate of anything here.
Which flours are not keto? Wheat, spelt, rye, plain, self-raising, rice, corn, oat and chickpea flours are all starch-heavy and off the plan. So are most “gluten-free” blends, which lean on rice and potato starch. Watch out too for “low-carb baking mixes” padded with hidden starches; the habits in reading labels and spotting hidden carbs catch these.
Choosing without overthinking it
For nearly everyone, almond flour plus a bag of coconut flour covers the whole range of keto baking, with psyllium husk on hand when you want bread to hold together. Add lupin or sunflower seed flour only when you have a reason, such as baking nut-free or wanting a more bread-like bite. The rest are useful once you are confident but far from essential.
Cost is worth a thought, since almond and coconut flour are pricier than wheat by weight; the notes in keto on a budget apply. And because these flours are high in fat, the wider picture in best cooking fats for keto and nuts and seeds on keto is worth a look if baking becomes a regular habit. When you are ready to put a flour to work, the keto Belgian waffles recipe is an easy first bake.
This is general information about the ketogenic diet, not medical advice. Keto does not suit everyone; if you are pregnant, on medication, or managing a condition such as diabetes, speak to a doctor or dietitian first.