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–+ servings
finished plate cut and placed on plate.
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Sourdough Vanilla Cake

A comforting classic cake with the subtle tang of sourdough.
Prep Time20 minutes
Cook Time35 minutes
Cooling time2 hours
Total Time2 hours 55 minutes
Course: Dessert
Cuisine: American
Keyword: 9x13 Cake, Sourdough Discard, sourdough discard dessert, sourdough vanilla cake, Vanilla
Servings: 20 pieces
Calories: 274kcal
Author: Katie

Equipment

  • 9 x 13 Pan
  • Electric Mixer

Ingredients

Cake

  • 2 ¾ cups all-purpose flour
  • 1 ¼ cups sugar
  • 1 teaspoon baking powder
  • 1 teaspoon baking soda
  • ½ teaspoon salt
  • ¾ cup vegetable oil
  • 2 eggs
  • 2 teaspoons vanilla
  • ¾ cup discard sourdough starter
  • ¼ cup sour cream
  • 1 cup boiling water

Vanilla Frosting

  • ½ cup melted butter 1 stick
  • 2 teaspoons vanilla extract
  • 3 cups powdered sugar
  • ¼ cup milk
  • ½ teaspoon salt

Instructions

  • Prep oven and pan: Preheat the oven to 350°F with the rack in the center. Prepare a 9 x 13 pan with cooking spray.
    empty cake pan on marble counter.
  • Mix dry ingredients: In a large mixing bowl, combine the flour, sugar, baking powder, baking soda, and salt. Stir until well combined.
    mixing bowl of dry ingredients.
  • Add wet ingredients: Add the vegetable oil, eggs, increased 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.
    oil and other wet ingredients added to dry ingredients.
  • Add boiling water. Pour in the cup of boiling water and stir well until a smooth batter forms.
    batter before and after adding hot water.
  • Bake. Pour into the 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.
    cake pan with vanilla batter before and after baking.
  • Cool. Cover cake with a clean tea towel and allow it to cool directly in the pan. Cool completely before frosting.
  • Frost. To make the vanilla frosting, combine the melted butter and vanilla extract 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. Frost the cake and serve directly out of the pan.
    pyrex dish with frosting ingredients and mixed frosting.
  • Serve. Frost the cake and serve directly out of the pan.
    overhead view of finished and frosted sourdough vanilla cake.

Nutrition

Calories: 274kcal | Carbohydrates: 46g | Protein: 3g | Fat: 7g | Saturated Fat: 1g | Polyunsaturated Fat: 1g | Monounsaturated Fat: 3g | Trans Fat: 0.002g | Cholesterol: 18mg | Sodium: 255mg | Potassium: 37mg | Fiber: 1g | Sugar: 30g | Vitamin A: 250IU | Vitamin C: 0.04mg | Calcium: 26mg | Iron: 1mg