Sourdough Banana Cake

Use your discard sourdough starter to make this sweet, moist cake, topped with an easy cream cheese frosting.

A recipe for sourdough banana cake that uses your discard sourdough starter for an easy and delicious cake topped with cream cheese frosting.

square slice of sourdough banana cake with cream cheese frosting

Sourdough bakers are always looking for ways to use discarded starter, and this recipe is a new favorite. Just like my sourdough chocolate cake, this is a true cake: a dessert, not a breakfast. (Not that I would judge you for having a slice in the morning!).

If you’re looking for more of a banana bread with your sourdough starter, you can grab that recipe here.

But if you’re ready for a yummy banana cake, read on.

Ingredients

bananas, sourdough starter, baking soda, flour, sugar, powdered sugar on marble counter
  • 2 very ripe bananas mashed
  • 1/2 cup granulated sugar
  • 1/2 brown sugar
  • 1/2 cup vegetable oil
  • 2 eggs
  • 1 teaspoon vanilla
  • 2 cups flour
  • 1 teaspoon baking soda
  • 1/2 teaspoon salt
  • 1/2 cup sourdough starter discard or unfed
  • non-stick baking spray

Making the cake, step by step

process of making sourdough banana cake- beating sugar, oil, and bananas, mixing in dry ingredients, adding starter, and baking

Before you get started, preheat your oven to 350 with a rack in the center.

This is an easy recipe and since it’s vegetable oil based, there’s no need to break out the stand mixer. A hand mixer will work fine. Mash up your bananas a little bit to help them blend in easily.

First beat the oil, sugars, and banana in a large mixing bowl with your mixer on medium speed. Add the egg and vanilla, and mix until combined.

Combine the flour, baking soda, and salt in a separate large mixing bowl. Add the dry ingredients 1/3 at a time, mixing on low until just combined after each addition. Add the sourdough starter and stir in by hand. Don’t worry, the starter doesn’t make the cake taste sour at all.

Pour the batter into the prepared cake pan and bake in the preheated oven for 45-50 minutes, or until a cake tester inserted into the center comes out clean. Carefully turn cake out onto cooling rack. Allow to cool completely before frosting.

Cut into wedges or squares to serve. Cover and refrigerate any leftovers for up to 5 days.

round cake with cream cheese frosting
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Sourdough Banana Cake

Print Recipe
Use your discard sourdough starter to make this sweet, moist cake, topped with an easy cream cheese frosting.
Prep Time:30 mins
Cook Time:50 mins
Total Time:1 hr 20 mins
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Ingredients

Cake

  • 2 very ripe bananas masheed
  • 1/2 cup granulated sugar
  • 1/2 brown sugar
  • 1/2 cup vegetable oil
  • 2 eggs
  • 1 teaspoon vanilla
  • 2 cups flour
  • 1 teaspoon baking soda
  • 1/2 teaspoon salt
  • 1/2 cup sourdough starter discard or unfed

Frosting

  • 4 ounces cream cheese room temperature
  • 6 tablespoons butter room temperature
  • 1 teaspoon vanilla
  • 2.5 cups powdered sugar

Instructions

Make the Cake

  • Preheat oven to 350 degrees with the rack in center. Prepare a 9 inch round or square cake pan with cooking spray or shortening dusted with flour
  • Beat the oil, sugars, and banana in a large mixing bowl with an electric mixer on medium speed. Add the egg and vanilla, mix until combined.
  • Combine the flour, baking soda, and salt in a separate large mixing bowl. Add the dry ingredients 1/3 at a time, mixing on low until just combined after each addition. Add the sourdough starter and stir in by hand.
  • Pour the batter into the prepared cake pan and bake in the preheated oven for 45-50 minutes, or until a cake tester inserted into the center comes out clean. Carefully turn cake out onto cooling rack. Allow to cool completely before frosting.
  • Cut into wedges or squares to serve. Cover and refrigerate any leftovers for up to 5 days.

Make the Frosting

  • Beat the cream cheese and butter in a large mixing bowl until smooth. Add the vanilla and mix until combined. Add half the powdered sugar and beat on low. Add the remaining powdered sugar and beat on low until combined, then increase the speed to medium and beat for 1 minute.

Notes

You can bake this in a loaf form as well but it will need at least 60 minutes of baking time.
Don’t like cream cheese frosting?   Try a caramel frosting instead!  

Nutrition

Calories: 333kcal | Carbohydrates: 50g | Protein: 4g | Fat: 13g | Saturated Fat: 10g | Trans Fat: 1g | Cholesterol: 39mg | Sodium: 238mg | Potassium: 57mg | Fiber: 1g | Sugar: 34g | Vitamin A: 179IU | Calcium: 26mg | Iron: 1mg
Course: Dessert
Cuisine: American
Keyword: sourdough banana cake, sourdough cake recipe, sourdough desserts, sourdough discard recipes
Servings: 12 slices
Calories: 333kcal
Author: Katie Shaw
Did you make this recipe?Tag me @heartscontentfarmhouse so I can see!

Hope you enjoy this sourdough cake recipe!

signature with strawberries

Click here to subscribe By on March 4th, 2021

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