Skip the cake mix. Make a perfect Yellow Cake with Double Fudge Frosting from scratch instead! This version of the birthday cake favorite is 100% homemade. Tender, moist crumb with loads of fudgy frosting.
For the Cake, beat butter for 2 minutes. Add sugar and vanilla, continue beating with electric mixer. Add eggs and extra egg yolk, beating well after each addition. Beat in the sour cream.
Combine the flours, baking powder and salt in a small bowl using a whisk. Add to mixing bowl, alternating with the buttermilk. Beat 2 minutes after all is added.
Pour cake batter into two greased and floured 9-inch cake pans (make sure they have 2 inch sides). Bake in a 350 degree oven for 35-38 minutes. Remove and cool completely.
For the frosting, add milk chocolate morsels and butter into a small microwave safe bowl. Microwave for 30 seconds, mix and continue heating in 30 second increments (mine took one minute). Be sure to whisk the butter into the melted chocolate completely.
In a large mixing bowl, combine sour cream, dark cocoa powder, salt and melted chocolate mixture. Mix until blended. Add powdered sugar and vanilla, beat for 3-5 minutes until well blended and fluffy.
To assemble cake, lay one layer of cake on a cake platter. Spread frosting over the top. Add second layer of cake. Spread frosting over sides and top of cake.
Add sprinkles for decoration. ENJOY.
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Notes
To make a crumb coating with the frosting, spread a very thin layer of frosting over the cake. Refrigerate for 10 minutes. Add final layer of frosting and enjoy.
To make cupcakes, line a cupcake tin with paper liners. Scoop batter into cupcakes until 2/3 full (makes 24 cupcakes). Bake for about 15-17 minutes. Cool before frosting.
Add colorful sprinkles to the frosted cake for some festive flair.