Grasshopper Fudge Cake

box Betty Crocker® SuperMoist® white cake mix

Water, vegetable oil and egg whites called for on cake mix box

mint extract

drops green food color

jars (16 oz each) hot fudge topping

container (8 oz) frozen whipped topping, thawed

drops yellow food color

Thin rectangular crème de menthe chocolate candies, unwrapped and cut into pieces, if desired