Root Beer Float Cake 3 Recipe

Combine first 4 ingredients. Beat on low speed for 30 seconds, beat on high speed for 2 minutes. Pour into greased 9x13 pan. Bake at 350° degrees fro 35 to 40 minutes or until a wooden toothpick inserted near center comes out clean. Cool completely on wire rack. In another mixing bowl, beat frosting mix and root beer until stiff peaks form. Frost cake. Chill