Copycat Costco Vanilla Cake

12tomatoes.com

Sherry

subheading: FOR THE CAKE:

2 ½ plus 2 tablespoons cake flour

1 ½ cups plus 2 tablespoons granulated sugar

1 tablespoon baking powder

¾ teaspoon fine salt

¾ cup unsalted butter, very soft

4 large egg whites, room temperature

1 large egg yolk, room temperature

1 tablespoon vanilla extract

1 cup buttermilk, room temperature

subheading: FOR THE BUTTERCREAM:

2 tablespoons water

2 tablespoons cornstarch

1 cup unsalted butter, very soft

½ cup vegetable shortening, room temperature

4 cups powdered sugar

½ teaspoon fine salt

1 tablespoon vanilla extract

3 to 4 tablespoons whole milk or heavy cream, room temperature

subheading: FOR ASSEMBLING THE CAKE:

Copycat Costco Vanilla Mousse

Sprinkles

Directions at 12tomatoes.com

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