Classic Irish Soda Bread (No Yeast)

Soda bread is the loaf to make when you want bread today, not tomorrow. There's no yeast and no waiting around for it to prove. The rise comes from bicarbonate of soda reacting with the acid in buttermilk, so the moment those two meet you've got bubbles working for you. Get it in a hot oven quickly and you'll have a proper crusty round in about three-quarters of an hour, start to finish.

It's genuinely one of the easiest breads you can make. The main thing to hold on to: work fast and handle it gently. Over-mix or dawdle and you'll knock the air out and end up with a heavy loaf. Treat it kindly and it's forgiving as anything.

What is soda bread and why does it need no yeast?

Traditional Irish soda bread is a chemically leavened bread. Instead of yeast slowly producing gas over hours, bicarbonate of soda (an alkali) reacts with an acid to release carbon dioxide almost instantly. In the classic recipe that acid is buttermilk, the slightly sour liquid left after churning butter. As soon as the wet meets the dry, the reaction starts, which is exactly why you bake it straight away rather than letting it sit.

The original loaves used soft Irish wholemeal flour, buttermilk, bicarb and salt. Nothing else. No fat, no sugar, no egg. What you're really making is a quick daily bread that was designed for a griddle or a pot oven over a fire, long before most homes had yeast to hand.

What ingredients do I need?

Five things, and you'll likely have most of them in already:

• Plain flour: 450g. Ordinary British plain flour is perfect. You don't want strong bread flour here; its higher gluten makes soda bread tough. For a more traditional, nuttier loaf, swap half for wholemeal.
• Bicarbonate of soda: 1 tsp (about 5g). This is the raising agent. Not baking powder, and definitely not both unless the recipe says so.
• Fine salt: 1 tsp. Fine so it disperses evenly through the dry mix.
• Buttermilk: around 400ml. The acid that makes the whole thing rise. Cultured buttermilk from the supermarket chiller is ideal.

That's the classic. Some cooks add a knob of butter rubbed in for a softer crumb, or a spoon of honey, but you don't need either for a lovely loaf.

What if I haven't got buttermilk?

This is the question everyone asks, and the good news is you've got several easy fixes. Buttermilk isn't always in the corner shop, so a soured milk substitute works well.

The simplest: stir 1 tablespoon of lemon juice or white vinegar into 400ml of ordinary milk and leave it for 10 minutes until it thickens and curdles slightly. That acidity does the same job as buttermilk. Semi-skimmed or whole milk both work.

Plain live yoghurt, loosened with a splash of milk to a pourable, single-cream consistency, also makes a beautiful tender loaf. Same goes for kefir if you make your own.

How do I make it, step by step?

The whole method is quick, so read it through first and have your oven already heating to 200°C (gas 6).

1. Sift the flour, bicarb and salt into a big bowl and give it a good whisk so the raising agent is evenly spread.
2. Make a well in the centre and pour in most of the buttermilk. Using one hand like a claw, or a round-bladed knife, bring it together into a soft, slightly sticky dough. Add the last of the buttermilk only if it looks dry. You want it soft, not stiff.
3. Tip onto a lightly floured surface and shape into a round about 4cm high with the lightest touch. Don't knead it.
4. Sit it on a floured baking tray, cut a deep cross, and bake for 40–45 minutes until golden and hollow-sounding underneath.

Full quantities and timings are in the recipe card below.

How do I know when it's done?

The classic test: tip the loaf over and tap the base with your knuckle. If it sounds hollow, like knocking on a door, it's cooked through. If it sounds dull and dense, give it another 5 minutes. A skewer into the centre should come out clean.

Soda bread browns quickly because of the milk sugars, so don't be fooled by a dark top into thinking it's done inside. If the crust is colouring too fast, lay a sheet of foil loosely over the top for the last 10 minutes.

Why did my soda bread come out heavy or dense?

Usually one of three things. Either the dough was overworked, so the gas got knocked out before it reached the oven; the loaf sat around too long before baking, so the reaction had fizzled out; or the bicarb was past its best. Bicarbonate of soda does lose its puff over time, so if yours has been open a couple of years, that could be your culprit.

Using strong bread flour instead of plain will also give you a chewier, denser result, as will adding too little liquid. Soda bread dough should be soft and a little tacky, not a firm ball.

How should I store it, and can I freeze it?

Soda bread is at its absolute best on the day it's baked, warm from the oven with cold butter. It has no fat or preservatives, so it stales faster than a yeasted loaf. Keep it wrapped in a clean tea towel or a paper bag at room temperature for up to 2 days. Day two, it's lovely toasted.

It freezes well. Cool completely, wrap tightly and freeze for up to 3 months. Defrost at room temperature, or slice before freezing so you can toast straight from frozen.

If you enjoy this kind of quick, hands-off baking, you might also like our everyday sourdough loaf for something more involved, or the wider how to make bread guide. And if you've got a soda bread habit forming, a focaccia recipe makes a nice change from the same round loaf.