Swapping grain is the fastest way to change a loaf, and the fastest way to ruin one. Every grain here behaves differently in dough — some hold less water, some ferment quicker, several barely build a gluten network at all. This is what each one actually does, how much to use, and what to expect when you cut it into a recipe.
The three things that change when you change grain
- Water. Bran and pentosans drink. Wholemeal and rye want 5–15% more; spelt, einkorn and emmer want 5–15% less.
- Time. Wholegrain flours carry more of what drives fermentation, so the dough is often ready sooner. Watch the dough, not the clock.
- Structure. Some of these grains cannot build a proper gluten network no matter how you handle them. That is not a fault to fix, it is the loaf you are making.
The wheats — including the ancient ones
Spelt, einkorn, emmer, khorasan and durum are all wheat. They are routinely sold as alternatives to it, which misleads a great many people — they all contain gluten.
| Grain | Gluten | Start at | Water | Tastes of | How it behaves |
|---|---|---|---|---|---|
| Common bread wheat | Contains gluten | 100% | baseline | Clean, mildly sweet | The baseline everything else is judged against. Strong, elastic, forgiving. |
| Wholemeal wheat | Contains gluten | 20–30% | +5–10% | Nutty, faintly bitter | Bran cuts gluten strands, so the crumb tightens. Bran also drinks water — add more, and ferment faster. |
| Durum / semolina | Contains gluten | 10–20% | −5% | Sweet, golden, distinctly pasta-like | Very high protein but a different gluten — strong yet less elastic. Gives a golden crumb and superb crust. |
| Spelt | Contains gluten | 20–30% | −5% | Sweet, nutty, mellow | Gluten is plentiful but fragile. Over-mix or over-ferment and it collapses. Handle gently, shorten bulk. |
| Einkorn | Contains gluten | 10–20% | −10–15% | Rich, eggy, almost buttery | The oldest wheat. Gluten barely forms a network — dough stays slack and sticky. Expect a dense, flat, delicious loaf. |
| Emmer / farro | Contains gluten | 15–25% | −5% | Earthy, deep, savoury | Similar to einkorn but a little more structure. Weak, extensible dough. |
| Khorasan (Kamut) | Contains gluten | 20–30% | baseline | Buttery, sweet, golden | Large grain, good protein, more workable than einkorn or emmer. A friendly ancient wheat to start with. |
Rye, and everything that is not wheat
| Grain | Gluten | Start at | Water | Tastes of | How it behaves |
|---|---|---|---|---|---|
| Rye — light | Contains gluten | 10–20% | +5% | Gentle sour, faintly grassy | Ferments noticeably faster than wheat. A small amount lifts flavour and starter activity. |
| Rye — dark / wholegrain | Contains gluten | 20–30% | +10–15% | Deep, malty, tangy | Almost no gluten network. Pentosans make the dough sticky rather than elastic. Expect a close crumb. |
| Pumpernickel rye | Contains gluten | up to 100% | +15–20% | Dark, molasses-like | A long slow bake in a tin. Nothing like a wheat loaf and not meant to be. |
| Barley | Contains gluten | 10–15% | +5% | Sweet, nutty, slightly cakey | Very little usable gluten. Softens crumb and browns fast. |
| Oats | Naturally gluten-free grain | 10–20% | +10% | Creamy, mild, comforting | Adds softness and moisture. Rolled oats soak best as a hot soaker first. |
| Buckwheat | Naturally gluten-free | 10–20% | +5% | Strong, earthy, almost mineral | Not a wheat at all. Assertive — a little goes a long way. |
| Rice flour | Naturally gluten-free | blend only | varies | Neutral, slightly gritty | Structureless on its own. The bulk of most gluten-free blends, and the best banneton dusting flour there is. |
| Sorghum | Naturally gluten-free | blend only | varies | Mild, faintly sweet | A softer, rounder base for gluten-free blends than rice alone. |
| Teff | Naturally gluten-free | blend only | varies | Malty, cocoa-like | Tiny grain, big flavour. The grain behind injera. |
| Millet | Naturally gluten-free | blend only | varies | Mild, sweet, a little sandy | Lightens a heavy gluten-free blend. |
| Maize / cornmeal | Naturally gluten-free | 10–15% | +5% | Sweet, sunny, granular | Adds crunch and colour. Coarse polenta on the base of a loaf is excellent. |
| Quinoa | Naturally gluten-free | up to 10% | +5% | Grassy, slightly bitter | Assertive. Rinse before milling or it can taste soapy. |
| Amaranth | Naturally gluten-free | up to 10% | +5% | Peppery, earthy | Strong flavour, use sparingly. |
What the crumb actually looks like
An open, airy crumb is a white-flour achievement. The more wholegrain or non-wheat flour you add, the tighter and moister the crumb becomes — not because you did it wrong, but because there is less gluten holding fewer, smaller bubbles. Judging a 40% rye loaf by white-loaf standards is the most common mistake in this whole area.
Blends worth making
| Blend | What you get |
|---|---|
| 80% strong white + 20% wholemeal | The everyday upgrade. More flavour, barely any extra difficulty. |
| 85% strong white + 15% dark rye | Deeper, tangier, better keeping. The easiest big win here. |
| 70% strong white + 30% spelt | Sweet and nutty. Shorten the bulk ferment. |
| 80% strong white + 20% khorasan | Golden crumb, buttery flavour, handles almost normally. |
| 60% strong white + 30% wholemeal + 10% rye | A proper country loaf. This is the classic for a reason. |
| 90% strong white + 10% buckwheat | Earthy and distinctive. Any more and it dominates. |
Adjusting a recipe you already know
- Swap by weight, not volume. Flours differ enormously in density.
- Hold back some water at first. Add the adjustment gradually and stop when the dough feels right.
- Check the dough an hour earlier than usual. Wholegrain doughs move faster.
- Shorten bulk for spelt and the ancient wheats. They go from ready to collapsed quickly.
- Expect a tighter crumb and stop treating that as failure.
One starter handles all of them
You do not need a different culture for every grain — a strong starter adapts within a feed or two. Buy a live sourdough starter, ready to bake with in about two hours. Then try the rye loaf, the wholemeal or the spelt guide.
For the short version see the grain selection guide. For which bag to buy, the flour guide covers specific mills and flours.
Ready to bake?
Browse our full library of 25 tested sourdough recipes.
