Easy Sourdough Discard Brownies

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These brownies are deeply, unapologetically chocolatey. And as a woman, I will just say there is about one week a month where that is exactly what the situation calls for. You know what I mean.

What makes these different from a regular brownie recipe is the sourdough discard. It adds a subtle depth that seems to pull the chocolate flavor forward. The texture is gooey in the best possible way. Not underdone. Not cakey. Right in that fudgy middle ground that makes you close your eyes on the first bite.

If you want to save this recipe for later, pin it on Pinterest so you can find it when the chocolate craving hits.

One of my favorite things about this recipe is the cleanup situation. Most of the time when I cook, I am still washing dishes while the food finishes. Not here. By the time these are in the oven, the pots and bowls are already clean and drying. And then the smell hits. That warm chocolate smell that fills the whole kitchen. At that point the hardest part of this entire recipe begins.

Waiting.

I have zero willpower when it comes to warm brownies. I never have. When my mom made brownies growing up, waiting for them to cool felt like actual torture. Nothing has changed. The official recommendation is 20 to 25 minutes before cutting. They need that time to fully set and finish cooking in the center. I respect that. I also start cutting at the 15-minute mark every single time. I am testing them. That is what I am doing.

If you have more discipline than I do, good for you. If you do not, I will not tell anyone.

What You Need

These easy sourdough discard brownies come together with ingredients you likely already have. Here is the full list.

For the dry mix: King Arthur all-purpose flour, sugar, cocoa powder and salt.

For the chocolate base: a stick of butter, one cup of chocolate chips and vanilla extract.

For the wet mix: two eggs and half a cup of sourdough discard. Active starter and discard both work here. You are using the starter for moisture and texture, not rise. The recipe is forgiving.

You will also want to line your 9x9 baking dish. I use parchment paper sheets for clean removal and easy cleanup. If you prefer a reusable option, silicone baking mats work as a zero-waste alternative.

How to Make Easy Sourdough Discard Brownies

Start by whisking your dry ingredients together in a large bowl. Flour, sugar, cocoa powder and salt. Set that bowl aside.

Melt your butter on the stovetop over medium-low heat. Remove it from the heat and add your chocolate chips and vanilla. Stir until the chocolate is fully melted and the mixture is smooth. This is the base that makes these brownies taste so rich.

Add the dry ingredients to your chocolate base and stir to combine. Then add your eggs and sourdough discard. Keep stirring until the batter is smooth, thick and glossy. This is what good brownie batter looks like.

Pour the batter into your prepared 9x9 dish and spread it evenly. Scatter extra chocolate chips across the top if you want that melty chocolate finish when they come out of the oven.

Bake at 350 degrees F for 40 minutes.

How to Know When Sourdough Discard Brownies Are Done

This is the question I get more than any other about brownies. Do not wait for a perfectly clean toothpick. Brownies are not a clean-toothpick dessert.

Use an instant-read thermometer. You are looking for an internal temperature between 200 and 210 degrees F. Any chocolate on the toothpick is melted chocolate chips, not raw batter.

Pull them out. They will look a little underdone in the center. That is correct. They will firm up as they cool. Give them at least 20 minutes before you cut into them. Or 15 minutes if you are like me.

Variations Worth Trying

I kept this bake simple, but here are a few additions I have done before that are worth knowing about.

White chocolate chips on top instead of semi-sweet give you a sweeter, creamier finish that works really well if you want a little contrast to the dark chocolate base.

Chopped pecans pressed into the top before baking add crunch and a little bit of that Southern comfort feeling that just belongs in an Appalachian kitchen.

A pinch of flaky sea salt on top right before it goes into the oven does something to the chocolate flavor that is hard to explain until you try it. It makes everything taste more like itself.

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Save this recipe on Pinterest so you have it the next time that chocolate craving hits.

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Frequently Asked Questions

Can I use active sourdough starter instead of discard? Yes. Active starter and discard both work in this recipe. You are using the starter for moisture and texture, not leavening. The baking brownies will not rise significantly either way.

My sourdough starter is straight from the fridge. Can I use it? Yes. You do not need to feed it first or bring it to room temperature. Pull it straight from the jar.

How do I know when my brownies are done without a thermometer? The edges should be set and pulling slightly from the sides of the pan. The center will look just barely done. If you press the top gently, it should feel firm but with a little give. When in doubt, pull them earlier rather than later.

Can I double this recipe? Yes. Double all ingredients and bake in a 9x13 pan. Add 5 to 10 minutes to the bake time and check with a thermometer.

How do I store leftover brownies? Store in an airtight container at room temperature for up to 4 days. Refrigerate for up to one week. They actually get fudgier the second day.

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Find Everything I Used in One Place

All of the tools and products I used for this recipe are saved in my Amazon storefront. You will find the thermometer, the parchment inserts, parchment paper, silacone baking mats and more in my Sourdough Baking Essentials list.

Sourdough Baking Essentials

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