Preheat oven to 350°F. Line cupcake pan with paper liners.
Combine beer, vegetable oil, and eggs, and mix until combined.
Add flour, sugar, baking powder, and salt and whisk until fully incorporated.
Divide batter evenly among 18 cupcake liners and bake for 18-22 minutes.
Cool completely.
White Beer Buttercream Frosting
Beat butter until soft. Add remaining ingredients and beat until smooth.
Chocolate Football Frosting
Beat butter until soft. Add remaining ingredients and beat until smooth.
Decoration
To decorate like footballs, pipe the chocolate frosting back and forth on top of the cupcake, starting with shorter lines and getting longer as you get closer to the center of the cupcake, and then getting shorter again as you get back toward the other side of the cupcake.
Pipe the white frosting in a line length-wise on top of the chocolate frosting. Pipe short, white lines over top across the long line.
Notes
Put a few grains of uncooked rice under the paper cupcake liners to make the baked cupcakes easier to remove from the pan.If you make the white icing before you make the chocolate icing, both icings can be made in the same bowl. If you make the chocolate icing first, you'll need a clean bowl for the white icing to keep it white!One 12-oz beer is the exact amount needed for this recipe.