Trader Joe's Copycat Vanilla Mini Sheet Cake Recipe
Prep Time:
1 hour, 25 minutes
Cook Time:
25 minutes
Servings:
6 Servings
Ingredients
  • 1 large egg
  • ⅓ cup whole buttermilk
  • 2 tablespoons heavy cream
  • 3 tablespoons vegetable oil
  • 1 teaspoon vanilla bean paste or extract
  • ¾ cup granulated sugar
  • 1 cup all-purpose flour
  • ½ teaspoon baking powder
  • ¼ teaspoon baking soda
  • ½ teaspoon kosher salt
  • ¼ cup unsalted butter, softened
  • 2 ounces cream cheese, softened
  • 1 ¼ cups confectioners’ sugar
  • 1 teaspoon vanilla bean paste or extract
  • ¼ teaspoon kosher salt
Directions
  1. Preheat the oven to 350 F.
  2. Begin the cake: In a medium bowl, whisk to combine the egg, buttermilk, cream, oil, vanilla, and sugar.
  3. Add the flour, baking powder, baking soda, salt, and ¼ cup water. Whisk until smooth.
  4. Spray to coat an 8x5 ½-inch disposable pan with cooking spray. (You can also use an 8-inch square baking pan or ⅛ sheet pan, adjusting the baking time as needed.)
  5. Pour the batter into the pan and bake for 25-30 minutes, or until the cake springs back to the touch.
  6. Transfer the cake to a cooling rack and cool completely before frosting, about 1 hour.
  7. Prepare the frosting: Beat the butter and cream cheese in a stand mixer fitted with the paddle attachment until smooth.
  8. Add confectioners’ sugar, vanilla, and salt. Beat until smooth and fluffy.
  9. Transfer the frosting to a piping bag fitted with a medium round tip (or a zip-top bag without a tip).
  10. Pipe lines of frosting over the cooled cake to coat.
  11. Decorate the cake with berries and/or flowers, if desired, and serve.