Sourdough Irish Soda Bread Recipe (Easy Discard Recipe)

If you keep a sourdough starter on your kitchen counter like I do, you probably find yourself constantly looking for sourdough discard recipes to avoid wasting that beautiful fermented flour. This sourdough Irish soda bread recipe is one of my favorite ways to use discard because it’s quick, hearty, and incredibly satisfying.

Unlike traditional sourdough loaves that require long rise times and careful timing, sourdough Irish soda bread is a type of quick bread. That means there’s no waiting around for the bread rise to happen. Instead, baking soda works as the leavening agent, reacting with an acidic ingredient like sourdough discard or lemon juice to help the bread rise beautifully in the oven.

The result is a hearty loaf with a tender crumb, slightly tangy flavor, and rustic crust that pairs perfectly with a bowl of stew or a warm cup of coffee.

Scroll down for the recipe card, followed by detailed step-by-step instructions (with photos). 

This post may contain affiliate links. As an Amazon Associate I earn from qualifying purchases.

It’s also the great way to celebrate St. Patrick’s Day dinner, especially served alongside something cozy like Guinness stew or salted butter. Let’s make this great bread together! ♡

Sourdough Irish Soda Bread Recipe

What Is Sourdough Irish Soda Bread?

A traditional Irish soda bread recipe uses baking soda instead of yeast. The soda reacts with sour milk or buttermilk to create bubbles that help the bread rise.

This sourdough soda bread adds sourdough discard to the mix, which gives the bread:

• A subtle tang
• A more complex flavor
• A slightly softer tender crumb

It’s still a type of quick bread, meaning the baking soda does the heavy lifting rather than commercial yeast.

Because of that, there’s no need for long fermentation time or waiting for an active sourdough starter to double. This recipe works perfectly with discard or even a small amount of active starter.

Why You’ll Love This Recipe

This sourdough Irish soda bread recipe is truly a great recipe for both beginners and seasoned bakers.

You’ll love it because:

• It’s ready in under an hour
• Uses sourdough discard you might otherwise throw away
• Requires no kneading or complicated techniques
• Creates a rustic round ball loaf with a crisp crust

If this is your first time baking soda bread, don’t worry. The process is simple and forgiving.

Ingredients You’ll Need

This loaf uses simple pantry staples.

Dry Ingredients

• Purpose flour (or all-purpose flour)
• Whole wheat flour or wholemeal flour
• Baking soda
• Kosher salt or sea salt
• Optional caraway seeds
• Raisins

These dry ingredients create the base of the bread and help form the flour mixture.

Wet Ingredients

• Sourdough discard or active sourdough starter
• Buttermilk or sour milk
• Sugar
• Eggs
• Lemon juice
• Melted Irish butter or regular butter
• Optional orange zest

The wet ingredients combine with the dry ingredients to create the signature sticky dough that soda bread is known for.

Tips for the Best Soda Bread

A few simple techniques make this sourdough soda bread even better.

1. Don’t Overwork the Dough

Soda bread dough should be slightly sticky dough. Stir gently with a wooden spoon, dough whisk, or even a gingered whisk.

You’re just combining the flour mixture and liquid ingredients, not kneading like yeast bread.

2. Score the Top

Use a sharp knife to cut a deep cross across the top of the bread before baking.

Traditionally, this helps the bread rise evenly and also symbolizes blessing the loaf.

3. Bake Until Golden

Bake until the crust is golden brown and the loaf sounds hollow when tapped.

Shaping the Bread

Turn the dough onto a well floured surface and shape it gently into a round ball.

You can bake the loaf:

• On a baking sheet
• In a cast-iron skillet
• Inside a dutch oven
• Or inside a loaf pan or loaf tin

Each method works beautifully.

For a rustic farmhouse look, I love baking it in a cast-iron skillet lined with parchment paper.

Serving Suggestions

Fresh from the oven, this fresh bread is incredible with:

• A pat of Irish butter
• Homemade jam
• Honey
• A warm bowl of Guinness stew

It also makes the perfect side for St. Patrick’s Day dinner.

If there are leftovers (which rarely happens in my house), wrap the loaf in aluminum foil to keep it fresh.

Measuring Flour

For best results, measure about 360 grams of flour total if using a kitchen scale.

Using grams of flour helps ensure the correct texture and prevents the loaf from becoming too dense.

Side note: Sometimes I like to substitute the one cup of whole wheat flour with fresh milled flour. I use soft white wheat berries and use one cup of the fresh milled flour in this recipe.

Variations to Try

Once you’ve made this loaf once, you’ll probably want to try it again next time with fun additions.

Try mixing in:

• Raisins or currants
• Orange zest and honey
• Cheddar and herbs
• Extra caraway seeds

Each variation creates a slightly different complex flavor while still producing a chewy loaf with a soft interior.

Storing the Bread

Wrap cooled bread in aluminum foil or store it in an airtight container.

It will stay fresh for about 2 days at room temperature.

To refresh slices, warm them slightly in the oven.

This sourdough Irish soda bread recipe might become one of your favorite sourdough discard recipes.

It combines the rustic charm of a traditional Irish soda bread recipe with the depth of sourdough flavor — without the stress of long fermentation process or complicated baking schedules.

Whether you’re baking it for St. Patrick’s Day dinner, a cozy weekend breakfast, or simply because you have extra starter sitting on the counter, this great recipe produces a comforting hearty loaf every single time.

Slice it warm, spread on a little bit of butter, pour yourself a cup of coffee, and enjoy one of the simplest homemade breads you’ll ever bake.