1 cup root beer
1/4 cup water
1/2 cup canola oil
3 eggs
1 tsp. root beer extract
4 cups powdered sugar
1 package (8 ounces) cream cheese, softened
1/2 cup (1 stick) butter, softened
1 tsp. vanilla extract
Preheat oven to 350 degrees. In a large bowl, combine cake mix, root beer, water, oil, extract, and eggs. Beat on low speed for 2 minutes or stir by hand for 3 minutes. Pour into a greased 13x9-in. baking pan. Bake at 350° for 30-35 minutes, or until toothpick inserted comes out clean. Cool completely on a wire rack. In a small bowl, beat the cream cheese, butter, and extracts. Gradually fold in the powdered sugar. Beat until soft peaks form. Frost the cooled cake. Store in a refrigerator before serving.