One-Bowl Vanilla Cake recipe

A fluffy and moist cake with the best easy vanilla frosting! All you need is one bowl and a whisk to make it!

Course Dessert
Cuisine American
Keyword one bowl vanilla cake, vanilla cake
Prep Time 10 minutes
Cook Time 25 minutes
Total Time 35 minutes
Servings 9 servings
Calories 425 kcal
Author Anna


for cake:

  • 1.25 cup all-purpose flour
  • 3/4 cup granulated sugar
  • 1/2 teaspoon baking soda
  • 1 teaspoon baking powder
  • 1/4 teaspoon salt
  • 1 large egg
  • 1/2 cup vegetable oil
  • 1/2 cup buttermilk see note
  • 1/2 cup hot water
  • 2 teaspoons pure vanilla extract

for frosting:

  • 1/2 cup unsalted butter softened
  • 1.5 cup powdered sugar sifted
  • 1 teaspoon pure vanilla extract
  • 1 tablespoon heavy cream
US Customary - Metric


  1. Preheat oven to 350 degrees F. Grease and flour or line with parchment paper, an 8" square or round pan. Set aside.
  2. In a large mixing bowl, whisk together flour, sugar, baking soda, baking powder and salt.
  3. Add egg, buttermilk, vanilla and oil. Whisk together. Add hot water and whisk well until the batter is smooth. It will be runny but that's okay.

  4. Pour batter into prepared pan. Tap the pan gently against the counter to release any air bubbles.
  5. Bake cake for 25 to 28 minutes or until golden on top and a toothpick inserted in a few places comes out clean.
  6. Cool cake completely before frosting.
  7. To make frosting: place butter in a medium mixing bowl and beat for 7 minutes. Add powdered sugar, 1/2 cup at a time and beat in well. Add heavy cream and beat in for 1 minute. Add vanilla and mix in. The frosting should be very fluffy. Spread over cooled cake. Decorate with sprinkles.

Recipe Notes

To make homemade buttermilk: mix 2 teaspoons apple cider vinegar with enough half and half to make 1/2 cup of liquid. Let stand for 3 to 4 minutes. When the mixture looks thick and curdled, use in the recipe.

Use good quality vanilla as that is the primary flavor in this cake.

For the best frosting: make sure the butter is soft. Otherwise, the frosting won't be fluffy.

Nutrition Facts
One-Bowl Vanilla Cake recipe
Amount Per Serving
Calories 425 Calories from Fat 216
% Daily Value*
Fat 24g37%
Saturated Fat 17g106%
Cholesterol 49mg16%
Sodium 150mg7%
Potassium 88mg3%
Carbohydrates 50g17%
Sugar 37g41%
Protein 2g4%
Vitamin A 390IU8%
Calcium 43mg4%
Iron 0.9mg5%
* Percent Daily Values are based on a 2000 calorie diet.