Chocolate Peppermint Cake

1 devils food cake mix
1 jar Smuckers hot fudge sauce
1 can sweetened condensed milk
1/4 t. Peppermint extract
8 oz cool whip
1 bag Andes peppermint crunch baking chips

Bake cake according to directions in 9x13 pan. While cake is baking, mix milk, fudge sauce and extract together. When cake is done and still warm, poke holes with a fork. Pour milk mixture over cake. Let cool completely. Sprinkle half the peppermint chips over cake, then spread cool whip on top. Sprinkle rest of chips on top of cool whip. Chill.