Sourdough Irish Brown Bread With Guinness


Last Updated: Mar, 19, 2026 by Mimi Council | This post may contain affiliate links.

This Sourdough Irish Brown Bread With Guinness is a delightful fusion of tangy sourdough and rich, malty Guinness beer, resulting in a hearty loaf with a depth of flavor that's simply irresistible.

If you’re looking for more St. Patrick’s Day inspired recipes, check out some of my other favorites like Thin Mint Biscotti, Sourdough Irish Soda Bread, or Slow Cooker Beef Brisket Stew.

sourdough irish brown bread with guinness on a wood cutting board on a white marble counter.

A Quick Look At The Recipe

  • Recipe Name: Sourdough Irish Brown Bread With Guinness
  • Ready In: 1 hour
  • Makes: 10 servings
  • Main Ingredients: whole what flour, salted butter, molasses, Guinness
  • Flavor Profile: dark brown bread with a hearty flavor
  • Dietary Info: eggless, no seed oils
  • Difficulty: Easy!
  • Why You’ll Love It: easy brown bread perfect for St. Patrick's Day

Why You'll Love This Recipe

  • Made with Sourdough Discard: Made with sourdough discard—a byproduct of feeding and maintaining a sourdough starter—this organic bread embodies the ethos of reducing waste while creating something truly delicious! My two favorite things!
  • Guinness: This homemade bread with Guinness beer adds complexity and depth to this bread, infusing it with notes of roasted barley and caramel for a sweet and simple loaf bread that’s perfect with just a pad of butter.
  • Easy AF: This sourdough discard Guinness bread is easy AF! It literally took me just a few minutes to mix up the batter and I didn’t even need to get out my stand mixer. You know a recipe is easy when even I don’t want to use the mixer! You will love this homemade bread with Guinness for St. Patrick's Day.
Jump to:

What is Irish Brown Bread?

Irish brown bread is a traditional quick bread made with whole wheat flour, baking soda, buttermilk, and usually Guinness. It’s dense, hearty, and full of nutty flavor, without needing yeast or long rising times. This bread is popular because of its strong roots in Irish heritage, its wholesome ingredients, and its versatility—delicious on its own with butter or served alongside soups, stews, and more!

I grew up in Chicago, where most everyone I knew was Irish. While I'm not Irish in the slightest bit, St. Patrick's Day was always something we celebrated because everyone around us did. So, it's a nostalgic holiday for me! So, I'm super excited to share this Sourdough Irish Brown Bread with Guinness! This brown bread is quick and easy, perfect for celebrating St. Patty's Day!

This was another recipe collab with my friend Hannah at Make It Dough! Each month we create a recipe that uses sourdough starter or sourdough discard in easy, fun, and creative ways! So, of course we had to make an Irish inspire recipe this month! Past recipes include Eggless Sourdough Molasses Cookies, Sourdough Discard Whole Wheat Sandwich Bread, and Sourdough Pretzel Buns!

Ingredients

individual ingredients for sourdough irish brown bread with guinness laid out against a white background.
  • Blackstrap Molasses: I use organic blackstrap molasses, this is where this brown bread gets its color.
  • Buttermilk: Organic buttermilk gives this bread a little tang. You can use store bought or if you don't have any, easily make your own with this Organic Buttermilk Recipe.
  • Guinness Beer: You'll need Guinness beer for that rich dark color and flavor of traditional brown bread.
  • Whole Wheat Flour: I use organic whole wheat flour, this also gives this brown bread some of its dark color as well as its hearty flavor.
  • Sourdough Discard: You can use your sourdough discard straight from the fridge.
  • All Purpose Flour: My favorite is Cairnspring Mills.

*For a full list of ingredients and measurements, visit the recipe card below.

Baker's Tips

  • Weigh ingredients for the best results.
  • This is an Irish quick bread, so you notice there's no yeast here! This uses baking soda to leaven it so it makes it quick and easy (hence the name, quick bread!).
  • While there is Guinness in this bread, the alcohol reduces significantly during the baking. So, this is safe for kids too!
  • I don't use sugar in this bread as I don't think it needs it with the alcohol and molasses, but if you want it a little, you can add in 50 grams of cane sugar along with the flour.
  • Don't overmix the batter, it should look more like a lumpy cake batter than a dough.
  • Allow the bread to cool completely before slicing. This will ensure it doesn't break and you get nice clean cuts.

How to Make Sourdough Irish Brown Bread With Guinness

molasses and butter melted in a small pot on the stovetop.
  1. Preheat oven to 400°F and line a 1-pound loaf pan with parchment paper. (I actually didn't use parchment paper here as I used my Caraway Loaf Pan and I didn't need it!) In a small pot, add the butter and molasses and put over low heat until melted completely. 
sourdough discard, guinness and buttermilk in a liquid measuring cup on a white marble counter.
  1. In a small bowl, whisk together sourdough discard, Guinness, and buttermilk until no traces of discard remain. 
dry ingredients for sourdough irish brown bread in a glass mixing bowl on a white marble counter.
  1. In a separate bowl, add the whole wheat flour, oats, flour baking soda, and sea salt and whisk together
ingredients for sourdough irish brown bread in a glass mixing bowl on a white marble counter.
  1. Make a well in the center of the flour mixture and pour the butter mixture and Guinness mixture in.
sourdough irish brown bread batter in a glass mixing bowl on a white marble counter.
  1. Stir the ingredients together until no dry bits of flour remain, make sure you scrape the bottom. Don’t overmix. The mixture should look more like a cake batter than a dough. 
sourdough irish brown bread with guinness in a loaf pan on a white marble counter.
  1. Pour the batter into the prepared pan. Using a butter knife or paring knife, make a deep, vertical slice through the center of the loaf. Top with more oats. 
woman holding sourdough irish brown bread with guinness in the kitchen.
  1. Bake at 400°F for 30 minutes. Then without opening the oven door, turn the heat down to 350°F and continue baking for another 15 to 20 minutes or until the center of the loaf has set and registers at least 200°F when probed with an instant-read thermometer. 
baked sourdough irish brown bread with guinness cooling on the stovetop.
  1. It's best to let this bread set and cool overnight before slicing. I just let it cool in the loaf pan on the counter.

What to Serve With Sourdough Irish Brown Bread With Guinness

This is delicious with just a pad of butter. The texture reminds me more of a quick bread than a traditional sourdough bread, so I really like it with plan butter. Feel free to add jam!

This would make a great side bread for recipes like Slow Cooker Pumpkin Stew, Healthy Beef Soup With Leeks, or Healthy Sloppy Joe Bowls.

Recipe FAQ's

Can I make Sourdough Irish Brown Bread with Guinness ahead of time?

Yes, this is actually a perfect bread to make ahead of time because it’s best if you let it cool completely overnight! So, making this the day before is perfect.

How should I store Sourdough Irish Brown Bread With Guinness?

Store this like a quick bread, in an airtight container or zip bag at room temperature for a few days. 

slice of sourdough irish brown bread with guinness and a big slab of butter on a black plate on a marble counter.

More Sourdough Discard Recipes

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sourdough irish brown bread with guinness on a wood cutting board on a white marble counter.

Sourdough Irish Brown Bread With Guinness

Mimi Council
This homemade bread Irish Brown Bread with sourdough discard is a quick and easy recipe for fresh bread! Try this Sourdough Discard Guinness Bread for St. Patrick's Day!
5 from 1 vote
Prep Time 10 minutes
Cook Time 50 minutes
Total Time 1 hour
Course Bread
Cuisine Irish
Makes 10 servings
Calories 196 kcal

Equipment

  • Digital Food Scale
  • Mixing Bowl
  • Small Pot
  • 1-pound Loaf Pan

Ingredients
 
 

  • 57 grams salted butter
  • 42 grams blackstrap molasses
  • 334 grams Guinness beer
  • 113 grams sourdough discard
  • 56 grams buttermilk
  • 210 grams whole wheat flour
  • 90 grams rolled oats (plus more for topping)
  • 60 grams all purpose flour
  • 1 teaspoon baking soda
  • 1 teaspoon fine sea salt

Instructions
 

  • Preheat oven to 400°F and line a 1-pound loaf pan with parchment paper.
  • In a small pot, add the butter and molasses and put over low heat until melted completely.
  • In a small bowl, whisk together sourdough discard, Guinness, and buttermilk until no traces of discard remain.
  • In a separate bowl, add the whole wheat flour, oats, flour baking soda, and sea salt and whisk together
  • Make a well in the center of the flour mixture and pour the butter mixture and Guinness mixture in.
  • Stir the ingredients together until no dry bits of flour remain, make sure you scrape the bottom. Don’t overmix. The mixture should look more like a cake batter than a dough.
  • Pour the batter into the prepared pan. Using a butter knife or paring knife, make a deep, vertical slice through the center of the loaf.
  • Sprinkle more oats on top of the dough.
  • Bake at 400°F for 30 minutes. Then without opening the oven door, turn the heat down to 350°F and continue baking for another 15 to 20 minutes or until the center of the loaf has set and registers at least 200°F when probed with an instant-read thermometer.
  • It's best to let this bread set and cool overnight before slicing. I just let it cool in the loaf pan on the counter.

Video

YouTube video

Notes

Tips
  • Weigh ingredients for the best results.
  • This is an Irish quick bread, so you notice there's no yeast here! This uses baking soda to leaven it so it makes it quick and easy (hence the name, quick bread!).
  • While there is Guinness in this bread, the alcohol reduces significantly during the baking. So, this is safe for kids too!
  • I don't use sugar in this bread as I don't think it needs it with the alcohol and molasses, but if you want it a little extra sweetness, you can add in 50 grams of cane sugar along with the flour.
  • Don't overmix the batter, it should look more like a lumpy cake batter than a dough.
  • Allow the bread to cool completely before slicing. This will ensure it doesn't break and you get nice clean cuts. If you want it to cool faster, transfer it to a wire rack.
  • High Altitude — Follow the recipe as noted.

Nutrition

Calories: 196kcalCarbohydrates: 30gProtein: 5gFat: 6gSaturated Fat: 3gPolyunsaturated Fat: 1gMonounsaturated Fat: 1gTrans Fat: 0.2gCholesterol: 13mgSodium: 387mgPotassium: 186mgFiber: 3gSugar: 4gVitamin A: 154IUCalcium: 29mgIron: 2mg
Want more recipes?Follow along on @mimisorganiceats for more inspiration!

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5 responses to “Sourdough Irish Brown Bread With Guinness”

  1. Mimi Council says:

    5 stars
    This brown bread with butter is just so delicious!

  2. Melissa says:

    Calls for sugar but not in the instructions

    • Mimi Council says:

      hi Melissa, thank so much for calling that out! I actually omitted the cane sugar last time I made it, as I don’t think it needs it! But i missed removing it from the ingredient list. I removed it now, but if you want a little sweeter brown bread, you can add in 50 grams of cane sugar in with the flour at that step. Totally up to you!

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