This recipe for the Best Birthday Cake with moist and fluffy yellow cake paired with rich and creamy milk chocolate buttercream is perfect for celebrating!
Preheat the oven to 350°F. Butter, flour, and line two 8-inch cake pans with parchment circles.
In a medium bowl whisk together the flour, baking powder, and salt.
In a large bowl with an electric mixer, beat the butter on medium-high speed until light yellow and fluffy, about 3 minutes. Add the egg yolk and vanilla and continue beating for 3 minutes. Turn the mixer to low and gradually add the powdered sugar. Increase speed to medium and beat until smooth and creamy.
*Use a very fresh egg yolk. If worried about food safety, use a pasteurized shell egg or omit the egg yolk completely.