Sourdough Discard Blondies

If you keep a sourdough starter on your counter, chances are you’ve asked yourself at least once: What else can I do with all this discard?

These Sourdough Discard Blondies are one of the simplest — and most satisfying — answers.

They’re chewy, rich, and deeply comforting, with a subtle depth of flavor that sets them apart from classic blondies. Best of all, they come together quickly, require no mixer, and don’t demand any fermentation timing. This is the kind of recipe that works just as well for a casual weeknight treat as it does for sharing with friends.

Why Sourdough Discard Works So Well in Blondies

Sourdough discard shines in dessert recipes like this because it adds complexity without overpowering sweetness. You won’t taste “sour” — instead, you’ll notice a more balanced, bakery-style flavor.

In these blondies, sourdough discard:

• Enhances depth of flavor
• Keeps the bars soft and moist
• Balances the sweetness of brown sugar
• Reduces food waste
• Makes the recipe more forgiving

Because the lift comes from baking powder, this recipe works beautifully with discard straight from the fridge.

The Texture: Chewy, Soft, and Perfectly Sliceable

These blondies strike the ideal balance:

• Soft centers
• Chewy edges
• Rich, buttery crumb
• Golden, slightly crisp top

Melted butter and brown sugar give them that classic blondie richness, while the sourdough discard helps prevent dryness — even after a day or two on the counter.

A Beginner-Friendly Sourdough Dessert

If you’re new to sourdough baking, this is an excellent recipe to start with. There’s no need to understand fermentation, dough strength, or proofing cues.

This recipe:

• Uses simple pantry ingredients
• Comes together in one bowl
• Takes about 15 minutes to prep
• Bakes in a standard 9×13 pan

It’s approachable, low-pressure, and consistently successful.

Sourdough Blondies

Prep Time: 15 minutes minutes

Cook Time: 30 minutes minutes

Servings: 12 People

Chewy, buttery sourdough discard blondies that come together fast. The easiest way to use up discard without sacrificing flavor.

5 from 5 votes

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Ingredients

• 170 g Melted Butter 1.5 sticks
• 2 Eggs
• 100 g Sourdough Starter ½ cup
• 350 g Brown Sugar 1¾ cups
• 10 g Vanilla 1 tbsp
• 250 g All Purpose Flour 1½ cups
• 1 tsp Baking Powder
• 1 tsp Salt
• 150 g Chocolate Chips 1 cup

Instructions

1. Preheat your oven to 350°F.
2. Add your melted butter, eggs, starter, brown sugar, and vanilla to a medium-sized bowl. Whisk thoroughly to combine.
3. Add your flour, baking powder, and salt to the bowl. Mix with a silicone spatula until all of the dry ingredients are incorporated.
4. Pour the batter into a greased 9”x13” baking pan. Top with chocolate chips (optional).
5. Bake for 30 minutes, or until the top is set and golden.

Notes

This recipe was developed using the metric system. Using cup measurements instead of the scale will result in a less accurate finished product.

 

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