Sourdough Discard Brownies
A no-waste recipe that turns yesterday's starter into today's treat. Fudgy, dense, and just-tangy-enough to keep you coming back. Mix it up in one bowl — most of the work is just whisking.
Discard recipes were how I made peace with sourdough's wasteful side. Every feeding produces leftover starter; every leftover starter can become something delicious. This is one of my favorites.
Ingredients
Batter
- 200g sourdough discard
- 250ml whole milk (or buttermilk)
- 2 large eggs
- 60g butter, melted
- 240g all-purpose flour
- 2 tbsp sugar
- 1 tsp baking powder
- ½ tsp baking soda
- ½ tsp fine salt
Method
- 1
Mix the batter
Whisk discard with the remaining wet ingredients until smooth. In a separate bowl, combine the dry ingredients.
- 2
Combine
Fold the dry into the wet until just combined. A few lumps are fine — overmixing makes things tough.
- 3
Rest briefly
Let the batter rest 10–15 minutes so the discard can hydrate the flour and develop a little tang.
- 4
Cook or bake
Cook on a hot, lightly greased griddle (for pancakes/crepes) or bake at 350°F until golden and a tester comes out clean.
Sarah's Tips
- Discard older than a week works fine if it smells pleasantly tangy, not unpleasant.
- Add a pinch of baking soda to mellow extreme sourness.
- Frozen discard works too — thaw at room temp before using.
Substitutions
Not everything has to come from the recipe list. Here's what swaps cleanly and what to watch for when you make a change.
Discard older than a week is fine if it smells pleasantly tangy. If it smells like solvent or acetone, do a fresh feeding first and use a few hours later.
Buttermilk for extra tang, oat or almond milk for dairy-free. Greek yogurt thinned with water works too.
Coconut oil, neutral oil, or vegan butter all work 1:1. Browned butter adds a richer flavor — worth the extra step.
What can go wrong
Every bake fails differently. Here are the three problems most likely to show up on this recipe — and how to recover.
Tough pancakes or muffins
Overmixed batter. Fold dry into wet just until combined — lumps are fine. Let the batter rest 10 minutes before cooking.
Discard smells too sharp
Add a pinch of baking soda to neutralize. The bubbles you'll see are a sign the soda is reacting with the acid — that's normal.
Pancakes don't get crispy edges
Cook in butter on a hot (375°F+) griddle. Cold pan = soggy edges.
Trouble with the starter itself? Read the troubleshooting library →
Variations to try
Once you've baked the base recipe a few times, these are the riffs worth chasing.
- Add a handful of fresh berries to pancake batter for breakfast.
- Swap savory: drop the sugar, add herbs and cheese, and bake in a loaf pan for a quick dinner bread.
- Use as the base for sourdough crackers — roll thinner and bake longer.
Frequently asked
Does the discard need to be active?
No — discard recipes use the discard for flavor and a bit of leavening assist, but baking soda or powder does the real lift. Discard from the fridge (even a week old) works fine.
Can I freeze discard?
Yes. Freeze in ¼ cup portions in a silicone tray. Thaw at room temperature before using. Frozen discard isn't viable for starting a new starter, but it's perfect for these recipes.
Why does my discard taste so sour now?
It's been hungry for a while. A pinch of baking soda neutralizes most of the sharpness in a finished bake.
Bake this with timers, scaling, and peak alerts.
Step-by-step timers that pause when you do. Dough-weight scaling rewrites every gram. Peak detection so you mix at the right moment. Log the bake when you're done.