Sourdough Discard Coffee Cake
I still remember turning a forgotten jar of sourdough discard into a tender, cinnamon-streaked coffee cake on a rainy Saturday — the house smelled like fall and nothing went to waste. This Sourdough Discard Coffee Cake uses a cup of discard or active starter to give the crumb extra tenderness and mild tang, making it a perfect weekend brunch centerpiece or an elevated companion to your morning coffee. If you like repurposing ingredients into cozy bakes, you might also enjoy trying a simple citrus twist like the 4-ingredient lemon cream cheese dump cake for a different quick treat.
Why you’ll love this dish
This coffee cake is forgiving, flavorful, and thrifty. Using sourdough discard reduces waste while adding moisture and depth to the batter. The cinnamon-brown sugar swirl gives every slice contrast — a soft, cake-like crumb with pockets of caramelized cinnamon. It’s a crowd-pleaser for brunch, a thoughtful neighbor gift, or a sweet finish after a casual dinner.
"A tender, tangy crumb with a cinnamon ribbon that disappears in no time — perfect with an afternoon cup." — home baker review
Besides taste, this recipe is ideal when you want something that rises reliably (thanks to baking powder), can be mixed in a single bowl, and scales well for feeding a group.
Step-by-step overview
Start by creaming the softened butter and white sugar until light. Add eggs, vanilla, milk and the sourdough discard to form a smooth batter. The dry ingredients (flour and baking powder) fold in to create a thick cake batter. Separately, combine brown sugar, a small amount of flour, melted butter and cinnamon to make the filling and the streusel-like topping. Layer half the batter into a pan, sprinkle the cinnamon sugar, add the remaining batter and finish with the topping. Bake until golden and a skewer comes out clean.
This overview helps you see the flow: mix wet, add dry, make cinnamon filling, assemble in layers, bake, cool slightly, then slice.
What you’ll need
- ½ cup (1 stick) butter, softened — for creaming with sugar. Substitute margarine in a pinch, but flavor is best with real butter.
- 1½ cups white granulated sugar
- 2 teaspoons vanilla extract
- 2 large eggs, room temperature
- 1 cup whole milk — buttermilk can be used for extra tang; reduce baking powder to 3 tsp if using acidic buttermilk
- 1 cup sourdough discard or active starter (discard at room temp)
- 4 teaspoons baking powder
- 3 cups all-purpose flour
- 1½ cups brown sugar (packed) — for the cinnamon filling/topping
- 5 Tablespoons all-purpose flour — used to thicken the cinnamon filling
- 4 teaspoons ground cinnamon — more or less to taste
- 6 Tablespoons butter, melted — for the cinnamon sugar filling & topping
If you want fruit added, fold a cup of finely chopped apples or berries into the batter; for a richer finish, see how an apple cake with cream cheese frosting balances fruit and cream cheese for inspiration.
Step-by-step instructions
- Preheat the oven to 350°F (175°C). Grease and flour a 9×13-inch pan or line it with parchment.
- In a large bowl, cream ½ cup softened butter with 1½ cups white sugar until fluffy.
- Beat in 2 eggs one at a time, then stir in 2 teaspoons vanilla.
- Add 1 cup whole milk and 1 cup sourdough discard. Mix until smooth.
- Whisk together 3 cups all-purpose flour and 4 teaspoons baking powder in a separate bowl. Gradually fold into the wet mixture until just combined. Avoid overmixing.
- For the cinnamon sugar layer, combine 1½ cups brown sugar, 5 Tablespoons flour, and 4 teaspoons ground cinnamon in a bowl. Stir in 6 Tablespoons melted butter until coarse and crumbly — this will be both the filling and the topping.
- Spread half the batter into the prepared pan in an even layer. Sprinkle half of the cinnamon mixture over the batter.
- Dollop the remaining batter over the cinnamon layer and smooth gently. Sprinkle the remaining cinnamon mixture evenly over the top.
- Bake for 35–45 minutes, or until the top is golden and a toothpick inserted near the center comes out clean or with moist crumbs (not wet batter).
- Cool the cake in the pan for 15–20 minutes before slicing. Serve warm or at room temperature.
How to serve Sourdough Discard Coffee Cake
Serve slices warm with a dusting of powdered sugar or a light cream cheese glaze for contrast. A scoop of vanilla ice cream or a spoonful of whipped cream makes it dessert-worthy. For brunch, plate it with fresh berries and a pot of strong coffee or a latte — and feel free to borrow assembly ideas from the creamy pairings used on the apple cake with cream cheese frosting (original) to create a frosting that complements the cinnamon.
How to store
- Room temperature: Keep the cooled cake in an airtight container for up to 2 days.
- Refrigerator: Store covered for up to 5 days; bring slices to room temperature or warm gently before serving.
- Freezing: Cut slices and wrap individually in plastic wrap, then place in a freezer-safe bag for up to 3 months. Thaw overnight in the fridge and warm in a low oven (300°F/150°C) for 10–15 minutes.
Always cool the cake completely before wrapping to avoid sogginess. When reheating, a quick 20–30 second zap in the microwave makes a single slice instantly comforting.
Helpful cooking tips
- Use room-temperature eggs and milk to encourage even mixing and better volume.
- Don’t overmix once the dry ingredients go in; overworking develops gluten and can make the cake tough.
- If your discard is very sour or very liquid, measure and adjust: if thinner than typical, reduce the milk slightly.
- For an extra-crisp topping, press a few extra tablespoons of the cinnamon mixture on top midway through baking.
- Rotate the pan once during baking if your oven has hot spots to ensure even browning.
Creative twists
- Apple-cinnamon: Fold diced apples into the batter and reduce the topping cinnamon by 1 teaspoon. For a creamier finish, top warm slices with a smear of cream cheese frosting similar to those on some apple cakes.
- Nutty crunch: Mix chopped walnuts or pecans into the cinnamon sugar for texture.
- Streusel swap: Replace half the melted butter in the topping with melted coconut oil for a subtle nutty twist.
- Gluten-free: Use a 1:1 gluten-free flour blend and add 1 teaspoon xanthan gum if your blend lacks it.
- Protein boost: For a breakfast-style rework, add a spoonful of protein powder to the batter and pair slices with the ideas from the baked protein pancake bowls for a hearty morning plate.
Helpful answers
Q: How long does it take to make?
A: Active prep is about 15–20 minutes; baking is usually 35–45 minutes. Plan roughly an hour total including cooling.
Q: Can I use active starter instead of discard?
A: Yes — active starter works fine. If your starter is very bubbly and active, the cake may have a slightly tangier note. No need to adjust leavening unless the starter is extremely liquid.
Q: Is the cake safe to eat if the discard was in the fridge?
A: Yes. Using refrigerated discard is common and safe; bring it to room temperature for easier mixing. Discard shouldn’t have any strong off odors; if it’s moldy or smells rotten, discard it entirely.
Q: Can I make this dairy-free?
A: Substitute plant milk (almond, oat) for whole milk and use dairy-free butter or coconut oil for the softened and melted butter. Texture will be slightly different but still delicious.
Q: Can I double the recipe?
A: You can double it for a larger crowd — use two pans or a larger pan and adjust baking time; larger pans may need additional 10–15 minutes. Check doneness with a skewer.
Q: How do I prevent a soggy bottom?
A: Make sure the batter layer isn’t too thin and let the cake cool slightly in the pan so the structure sets. If your oven tends to be humid, bake a few extra minutes.
Sourdough Discard Coffee Cake
Ingredients
Method
- Preheat the oven to 350°F (175°C). Grease and flour a 9x13-inch pan or line it with parchment.
- In a large bowl, cream the softened butter with white sugar until fluffy.
- Beat in the eggs one at a time, then stir in the vanilla.
- Mix in the whole milk and sourdough discard until smooth.
- In a separate bowl, whisk together the all-purpose flour and baking powder. Gradually fold it into the wet mixture until just combined.
- In a bowl, combine brown sugar, flour, and cinnamon. Stir in the melted butter until coarse and crumbly.
- Spread half of the batter into the prepared pan.
- Sprinkle half of the cinnamon mixture over the batter.
- Dollop the remaining batter over the cinnamon layer and smooth gently.
- Sprinkle the remaining cinnamon mixture evenly over the top.
- Bake for 35–45 minutes or until the top is golden and a toothpick inserted near the center comes out clean or with moist crumbs.
- Cool the cake in the pan for 15–20 minutes before slicing. Serve warm or at room temperature.
