Red, White, & Blue Layer Cake

Updated at: Thu, 17 Aug 2023 04:58:53 GMT

Step 1

Preheat the oven to 350°F and lightly spray three 6 inch layer cake pans with pan spray.

Step 2

Whisk the flour, baking powder, and salt together in a large bowl.

Step 3

In a separate bowl, whisk the vegetable oil, sugar, egg whites, and vanilla together until combined.

Step 4

Stir in about half of the flour mixture. Then stir in the milk and the rest of the flour mixture and mix until fully combined. The batter will be thin.

Step 5

Separate the batter out into 3 equal bowls (about 2 cups of batter in each). To one bowl add 1-2 drops of blue food coloring, to another bowl add 1-2 drops of red food coloring, and leave the last bowl plain.

Step 6

Pour each different color of the batter into a cake pan (they will only be about half full). Bake at 350°F for 25-30 minutes or until a cake tester comes out clean.

Step 7

Place a cooling rack on top of each cake pan and invert. The pan should slide cleanly away.

Step 8

Let the cakes cool completely to room temperature before trimming.

Step 9

Once the cakes are fully cooled. Using a sharp bread knife, trim the cakes until the layers are even. Wrap each layer tightly in plastic wrap and place in the freezer overnight to help the frosting spread on smoothly (minimum of 2 hours).

Step 10

In a large bowl using a handheld or stand mixer fitted with a paddle attachment, cream the room temperature butter, powdered sugar, vanilla, and salt until smooth.

Step 11

Add in the milk 1 tablespoon at a time until the desired consistency is reached. Then beat the frosting on high for 4-5 minutes until light and fluffy.

Step 12

Optional: If the frosting has a yellow tinge, you can add a tiny drop of purple food coloring to help the frosting look bright white!

Step 13

Remove cake layers from the freezer. Place the blue layer of cake on your cake stand and spread about ¼ of the frosting on top in an even layer.

Step 14

Then top with the white layer and repeat. Place the red cake layer upside down so that the top of your cake is as even as possible.

Step 15

Spread a thin layer of buttercream (your crumb coat) over the top and sides of the cake. Then place the cake back in the freezer for 30-60 minutes.

Step 16

If desired, set aside a small amount of buttercream in a piping bag to decorate the top of the cake (about 1/2 cup is plenty). Evenly smooth the rest of the buttercream on the top and sides of your cake as desired.

Step 17

Use an open star piping tip to make little dollops of frosting along the top and bottom edges of the cake, then garnish with red, white, and blue sprinkles if desired!

Step 18

Refrigerate the cake for 2-3 hours before slicing and serving.

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