The cola makes this cake super moist and the peanut butter frosting is so delicious! Try it with Coke, Dr. Pepper, even Root Beer!Plan Ahead Note: butter must be softened and eggs should be room temperature.
Combine cola and buttermilk in a 2 cup measuring cup.
Beat butter at low speed with an electric mixer until creamy.
Gradually add sugar, beating until blended.
Add eggs and vanilla; beat a lot speed just until blended.
Combine flour and next 2 ingredients in a medium bowl.
Add to butter mixture alternately with cola mixture, beginning and ending with flour mixture. Beat at low speed just until blended after each addition.
Pour batter into a lightly greased 13" x 9" pan. Bake at 350° for 30-35 minutes or until a wooden pick inserted in the center comes out clean. Cool in pan on a wire rack 10 minutes.
Frosting
Meanwhile prepare Peanut Butter Frosting. Melt butter in a large saucepan over medium heat.
Whisk in milk, and bring to a boil, whisking constantly.
Reduce heat to low, and whisk in peanut butter until smooth.
Gradually whisk in sugar until smooth; remove from heat, and whisk in vanilla. Pour over warm cake.