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vanilla birthday cake + chocolate buttercream frosting
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Prep Time: 30 minutes

Cook Time: 25 minutes

Total: 55 minutes

Servings: 1


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Step 1


Step 2

Heat the oven to 350°.

Step 3

Coat an 8" square cake pan with nonstick spray and line the bottom with parchment paper.

Step 4

Beat the butter and sugar together in a large bowl with an electric mixer until fluffy.

Step 5

Beat in egg, yolks, and vanilla until combined.

Step 6

Scrape down the bowl, and then sprinkle the baking powder, baking soda, and salt over the batter and beat until very well combined.

Step 7

Add the buttermilk and mix to combine (the batter may look curly).

Step 8

Add the cornstarch and flour and mix until the flour just disappears.

Step 9

Scrape the batter into the prepared pan and smooth the top.

Step 10

Bake for 25 to 27 minutes, until a toothpick inserted into the center of cake comes out batter-free.

Step 11

Let cool in the pan on a cooling rack for 10 minutes, then run a knife around the cake to ensure that it is loose.

Step 12

Flip in out onto a cooling rack, and then flip back right side up again onto another.

Step 13

Let cool completely before frosting.

Step 14


Step 15

Beat the butter, powdered sugar and salt in a large bowl with electric beaters (or paddle attachment for stand mixer) until fluffy.

Step 16

Pour in the chocolate, cream or milk, and vanilla and beat until combined, then 1 more minute to whip it further.

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