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4 from 3 votes

One Layer Cake

One layer cake that's made all in one bowl—so easy you can have it in the oven in ten minutes! And it's delicious!
Prep Time15 mins
Cook Time40 mins
Cooling Time15 mins
Total Time55 mins
Servings: 10 servings
Calories: 585
Author: Lucy Brewer


  • 1/2 cup unsalted butter, softened
  • 1/4 cup canola oil
  • 1 cup granulated sugar
  • 2 large egg yolks, room temperature
  • 2 large whole eggs, room temperature
  • 1/2 cup sour cream, room temperature
  • 1 teaspoon vanilla extract
  • 1/2 teaspoon almond extract
  • 1 1/2 cups all-purpose flour
  • 1 teaspoon baking powder
  • 1/4 teaspoon baking soda
  • 1/4 teaspoon salt

Chocolate Frosting

  • 1 stick unsalted butter
  • 3 cups confectioners sugar
  • 2/3 cup cocoa powder
  • Pinch salt
  • 2 tsps vanilla extract
  • 4 tbsp half-and-half


  • Preheat oven to 350. Grease and flour a 9x3 or 9x2-inch cake pan.
  • In a large bowl, cream butter and canola oil for about 3 minutes with a hand mixer. Add sugar and mix well. Add egg yolks, whole eggs, sour cream, vanilla extract, and almond extract and blend until well mixed.
  • Sift flour, baking powder, baking soda, and salt on a piece of parchment paper and pour in the bowl. Mix until just blended. Do not mix too long.
  • Scoop batter into prepared pan and bake for 30-40 minutes, until middle isn’t jiggly and tester comes out clean.
  • Allow pan to sit for 15 minutes then turn cake out onto cake plate.
  • Sprinkle with powdered sugar or frost.

Chocolate Buttercream Frosting

  • Using hand mixer, blend butter until creamy. Sift confectioners sugar, cocoa, and salt into the butter. Mix until blended. Add vanilla and half-and-half and blend until spreadable consistency. 


** The cake will probably sink just a tiny bit in the center. I usually slice the top anyway  to even it out so the sinking doesn't matter to me. To do this, just flip the cake onto a cooling rack initially. Once cool, flip over to the other side and using a bread knife lightly even out the top of the cake. Then flip that rough side onto the cake stand so that it's the bottom.
** Calories listed are estimated for cake only and do not include the frosting.