glass baking dish with missing piece of sourdough chocolate cake

One Bowl Sourdough Chocolate Cake

  • Author: Katie Shaw
  • Prep Time: 20 minutes
  • Cook Time: 40 minutes
  • Total Time: 1 hour
  • Yield: 1 13x9 cake 1x
  • Category: desserts
  • Method: baking
  • Cuisine: American


A moist and rich chocolate cake using your discarded sourdough starter.



For the cake

  • 2 cups all purpose flour
  • 1 1/4 cups sugar
  • 3/4 cup cocoa powder
  • 1 teaspoon baking powder
  • 1/2 teaspoon baking soda
  • 1/2 teaspoon salt
  • 3/4 cup vegetable oil
  • 2 eggs
  • 1 teaspoon vanilla
  • 3/4 cup discard sourdough starter
  • 1/4 sour cream
  • 1 cup boiling water

For the frosting

  • 1/2 cup (1 stick) melted butter
  • 2/3 cup cocoa powder
  • 3 cups powdered sugar
  • 1/3 cup milk


  1. Preheat the oven to 350 degrees with the rack in the center.  Prepare a 9 x 13 pan with cooking spray.
  2. In a large mixing bowl, combine the flour, sugar, cocoa, baking powder, baking soda, and salt.   Stir until well combined.
  3. Add the vegetable oil, eggs, vanilla, sour cream, and sourdough starter.  Stir to form a thick batter.  Pour in the cup of boiling water and stir well until a smooth batter forms.
  4. Pour into prepared baking pan and bake for 35-45 minutes, until a toothpick inserted into the center comes out clean, or with only a few crumbs. (The top may crack.)
  5. Cover cake with a clean tea towel and allow it to cool directly in the pan.  Cool completely before frosting.
  6. To make the frosting, combine the melted butter and cocoa in a large mixing bowl.  Add the powdered sugar and milk, alternating with each other, and beat with an electric mixer until a smooth frosting forms.
  7. Frost the cake and serve directly out of the pan.


If you have a smaller amount of sourdough discard to use, use 1/2 cup of discard and 1/2 cup of sour cream

Cake can also be baked as 2 rounds.

Keywords: sourdough chocolate cake, sourdough discard recipes, desserts with sourdough starter