Mint Parfait Bars

"The delightful combination of chocolate and mint make up these, soft, creamy,addicting bars. Your base starts with a cake mix, then, your mint cream center includes, powdered sugar, butter and shortening. Then, the frosting is just some chocolate chips and more butter. These bars are so addicting and delicious, eating just one of them is pretty much impossible! Here is what you need to make these bars: chocolate cake mix softened butter egg water unflavored gelatin boiling water powdered sugar softened butter shortening mint Extract green food coloring"

Cooking Vessel Size9 x 13 baking dish