Recipe

Sourdough Discard Coffee Cake

Tender sourdough discard coffee cake with cinnamon streusel topping and an optional vanilla glaze.

By Matt Campbell

•

4.8

A golden sourdough discard coffee cake in a baking pan with a thick cinnamon streusel topping and a few crumbs scattered on the counter, natural window light, real food photography style

If you keep a sourdough starter, you already know the routine: feed it, bake with it, and end up with a container of discard that is too precious to toss but too random to plan around. This sourdough discard coffee cake is my favorite kind of solution, because it feels like a treat, uses pantry staples, and makes your kitchen smell like a cinnamon hug.

The vibe here is classic coffee cake: tender crumb, buttery cinnamon streusel, and a not-too-sweet cake that actually wants a hot cup of coffee next to it. The sourdough discard adds a gentle tang and plays very nicely with the sour cream, which is doing most of the heavy lifting for that soft, moist texture. No sourdough wizardry required.

A mixing bowl of pale coffee cake batter with visible sourdough discard being folded in with a rubber spatula on a home kitchen counter, natural light

Why It Works

Moist, tender crumb without being gummy: Oil plus sour cream (or yogurt) keeps things soft, and gentle mixing keeps it light.
Chunky cinnamon crumbles: Melted butter helps the streusel clump up into those bakery-style nuggets.
Flexible for any discard: Includes easy hydration adjustments for thick or runny starter so your batter lands in the sweet spot.
Optional overnight option: A rest in the fridge deepens flavor and makes morning baking feel effortless (expect a slightly denser crumb).

Pairs Well With

Storage Tips

Room temperature: Store tightly covered for up to 2 days. If your kitchen runs warm, move to the fridge sooner.

Refrigerator: Keep in an airtight container for up to 5 days. The streusel softens a bit in the fridge, but a quick warm-up brings it back.

Freezer: Wrap individual slices in plastic wrap, then place in a freezer bag. Freeze up to 2 months.

To reheat: Microwave slices for 10 to 20 seconds or warm in a 300°F oven for about 8 minutes until cozy.

Common Questions

What counts as “discard” for this coffee cake?

Any unfed starter you would normally remove before feeding works. It can be straight from the fridge. Avoid using discard with fuzzy mold, a pink or orange tint, or a strong rotten odor. A little hooch (grayish liquid on top) is normal. Just stir it in or pour it off, your call.

Do I need active, bubbly starter?

Nope. This recipe is designed for discard. The lift comes from baking powder and baking soda.

My starter is very thick. How do I adjust?

If your discard is thick like dough, add 2 to 4 tablespoons milk to the batter to loosen it. You want a thick, scoopable batter that slowly levels in the pan, not something pourable like pancake batter.

My starter is very runny. How do I adjust?

If your discard is runny, skip the optional milk. If the batter still looks thin after mixing, add 1 to 2 tablespoons flour (start with 1) and fold gently until it thickens. Batter should be scoopable, not sloshy.

Can I rest the batter overnight?

Yes, with a small note: mix the batter, spread it in the pan, cover and refrigerate. Add streusel right before baking in the morning for the best topping texture. Because the leaveners start working once mixed, an overnight rest can bake up slightly denser (still delicious). Double-acting baking powder helps here. Bake straight from the fridge and add a few minutes if needed.

How do I keep coffee cake moist without overmixing?

Use room temp ingredients if possible, whisk the dry ingredients separately, then stir or fold gently just until you stop seeing dry flour. A few small lumps are totally fine. Overmixing makes coffee cake tight and chewy.

Can I bake this in a different pan?

Yes. An 8x8 pan gives thicker slices and usually takes a little longer. A 9x9 pan bakes a bit faster. A 9-inch round pan works too. For muffins, bake at 350°F, fill liners about 2/3 full, and start checking around 18 minutes. You will get about 10 to 12 muffins depending on your liner size.

Matt Campbell

I have always had a huge passion for the culinary arts, people, working as a team, and so on. I wanted to pursue my love for cooking initially at Virginia Commonwealth University with a culinary arts degree; however, I instead decided to apply myself and acquire more practical skills. My end goal is to eventually open my own restaurant or similar establishment.

Kitchen Essentials

8x8-inch or 9x9-inch baking pan
Mixing bowls (2)
Whisk
Rubber spatula
Measuring cups and spoons
Cooling rack
Optional: instant-read thermometer

I love sourdough, but I love not wasting food more. Coffee cake is my favorite way to make discard feel like a win instead of a chore. It is the bake I do when I want something cozy but not fussy, and I want the kind of breakfast that makes everyone wander into the kitchen “just to check on it.” Also, I am a firm believer that streusel is a food group. If you think you made too much, you did not.

Sourdough Discard Coffee Cake

(4.8 Reviews)

Prep Time 20 minutes

Cook Time 35 minutes

Total Time 55 minutes

Servings 9

Ingredients

Cinnamon streusel

1/2 cup (100 g) light brown sugar, packed
1/2 cup (60 g) all-purpose flour
1 1/2 teaspoons ground cinnamon
1/4 teaspoon fine salt
5 tablespoons (70 g) unsalted butter, melted and cooled slightly
Optional: 1/2 cup chopped pecans or walnuts

Coffee cake batter

1 1/2 cups (190 g) all-purpose flour
1 teaspoon baking powder (double-acting preferred)
1/2 teaspoon baking soda
1/2 teaspoon fine salt
1 teaspoon ground cinnamon
1/2 cup (100 g) granulated sugar
1/3 cup (70 g) light brown sugar, packed
2 large eggs, room temperature if possible
1 cup (240 g) sourdough discard (unfed starter, see hydration notes)
1/2 cup (120 g) sour cream or plain Greek yogurt
1/3 cup (75 g) neutral oil (canola, avocado, or vegetable)
2 teaspoons vanilla extract
2 to 4 tablespoons milk (30 to 60 g), only as needed for consistency

Optional glaze

3/4 cup (90 g) powdered sugar
1 to 2 tablespoons milk or coffee
1/2 teaspoon vanilla extract
Pinch of salt

Hydration note: This recipe is written for a typical 100% hydration starter (equal weights flour and water). If your discard is unusually thick, add a bit more milk. If it is very runny, reduce the milk or skip it entirely.

Instructions

Prep the pan and oven. Heat oven to 350°F. Grease an 8x8-inch or 9x9-inch baking pan and line with parchment if you want easy lift-out.
Make the streusel. In a bowl, mix brown sugar, flour, cinnamon, and salt. Stir in melted butter until you get clumps. If it looks sandy, keep stirring and pressing with a spoon until it forms crumbs. Fold in nuts if using. Set aside.
Mix dry ingredients. In a medium bowl, whisk flour, baking powder, baking soda, salt, and cinnamon.
Mix wet ingredients. In a large bowl, whisk granulated sugar, brown sugar, and eggs until smooth. Whisk in sourdough discard, sour cream, oil, and vanilla until combined.
Combine gently. Add dry ingredients to the wet ingredients. Stir or fold with a spatula just until you stop seeing dry flour. The batter should be thick and scoopable. If it feels too stiff to spread, add milk 1 tablespoon at a time. Stop as soon as it loosens up.
Assemble. Spread batter into the prepared pan. Sprinkle streusel evenly over the top, breaking up any very large chunks so it bakes through.
Bake. Bake for 32 to 40 minutes, until a toothpick inserted in the center comes out with a few moist crumbs (not wet batter). If you like numbers, the center should be about 200 to 205°F. If the top is browning fast, loosely tent with foil for the last 10 minutes.
Pan timing tips: A 9x9 often lands closer to 32 to 36 minutes. An 8x8 is thicker and often needs 36 to 40 minutes.
Cool. Let cool in the pan for 15 to 20 minutes. This sets the crumb and keeps the slices clean.
Optional glaze. Whisk powdered sugar, 1 tablespoon milk or coffee, vanilla, and a pinch of salt. Add more liquid a teaspoon at a time until it drizzles. For bold lines, glaze when mostly cool. For a soak-in vibe, glaze when slightly warm.

Overnight option

Prepare the batter, spread in the pan, cover tightly, and refrigerate overnight. In the morning, sprinkle on streusel and bake straight from the fridge, adding 3 to 7 minutes if needed. Expect the crumb to be a touch more snug than same-day baking, still very cozy.

A hand sprinkling chunky cinnamon streusel over unbaked coffee cake batter in a square baking pan on a kitchen counter

Nutrition information is estimated.

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