Fluffy White Cake with Buttercream Frosting
- Author: delishflavor
- Prep Time: 15
- Cook Time: 30
- Total Time: 45 minutes
Ingredients
For the White Cake:
- 8 oz unsalted butter, at room temperature
- 14 oz granulated sugar
- 6 large egg whites, room temperature (fresh, not boxed)
- 14 oz all-purpose flour
- 2 ½ teaspoons baking powder
- ½ teaspoon salt
- 1 teaspoon clear almond extract (for a whiter cake)
- 1 teaspoon vanilla extract
- 10 oz whole milk, at room temperature
- 2 oz vegetable oil
For the Buttercream Frosting:
- 8 oz pasteurized egg whites, at room temperature
- 32 oz powdered sugar
- 32 oz unsalted butter, at room temperature
- ½ teaspoon salt
- 1 tablespoon vanilla extract
White Cake:
- Preheat the oven to 335ºF. Grease and flour two 8″x2″ cake pans or use a pan release such as cake goop.
- In a small bowl, mix the milk, vegetable oil, almond extract, and vanilla extract. Set aside.
- In another bowl, whisk together the flour, baking powder, and salt. Set aside.
- Using a stand mixer fitted with the paddle attachment, beat the butter until smooth. Gradually add sugar and continue beating on high speed until the mixture is light and fluffy (about 5 minutes).
- Reduce the speed to low and add egg whites one at a time, ensuring each is fully incorporated before adding the next. If the egg whites are cold, warm them slightly in the microwave for a few seconds—be careful not to cook them!
- Alternate adding the dry and wet ingredients, beginning and ending with the dry ingredients:
- Add ⅓ of the dry ingredients and mix on low.
- Add ½ of the liquid mixture and mix just until combined.
- Repeat with another ⅓ of the dry ingredients, followed by the remaining liquid mixture.
- Finish with the last portion of the dry ingredients. Mix until just incorporated—do not overmix.
- Divide the batter evenly between the prepared cake pans. Bake for 25-35 minutes or until a toothpick inserted in the center comes out clean.
- Let the cakes cool in the pans for 10 minutes, then transfer them to a wire rack.
- While still slightly warm, wrap the cakes in plastic wrap and place them in the freezer for a quick chill to lock in moisture. Once cooled but not frozen, trim off any browned edges if desired.
Buttercream Frosting:
- In the bowl of a stand mixer fitted with the whisk attachment, combine the egg whites and powdered sugar. Whisk on low speed until combined.
- Increase to high speed and gradually add the butter in small chunks.
- Add vanilla extract and salt, then continue whipping on high speed until the buttercream is light, fluffy, and white.
Assembly:
- Once the cake layers have cooled, frost as desired with the buttercream.
- Chill the frosted cake before serving to help the flavors set.
- Slice and enjoy your soft, fluffy white cake with silky buttercream frosting!
Notes
- Room Temperature Ingredients: Ensure the butter, egg whites, and milk are at room temperature for a smooth and even batter. Cold ingredients can cause the batter to curdle.
- Whipping Butter & Sugar: Creaming the butter and sugar thoroughly (about 5 minutes) is key to a light and fluffy cake.
- Preventing Dense Cake: Do not overmix the batter once you add the dry ingredients; mix just until combined to avoid a dense cake.
- Baking Time Variation: Oven temperatures can vary, so check for doneness around 25 minutes. A toothpick inserted in the center should come out clean.
- Moisture Locking: Wrapping the warm cakes and chilling them briefly in the freezer helps retain moisture and makes them easier to handle when frosting.
- Frosting Consistency: If the buttercream appears too soft, chill it for 10-15 minutes before frosting the cake. If it looks curdled, keep whipping—it will come together!
- Extra White Cake: Use clear vanilla extract and almond extract to maintain a bright white cake color.
- Storing the Cake:
- Frosted cake can be stored at room temperature for up to a day or in the fridge for 3-5 days.
- Unfrosted cake layers can be wrapped and frozen for up to 3 months.
Nutrition
- Calories: 590kcal
- Sugar: 50g