Creme de cacao cake

1 (18.25 ounce) box yellow cake mix
2 cups heavy cream
1/4 cup dry chocolate-flavored drink mix
1/4 cup cr?me de cacao

Bake cake according to package directions in two 9-inch pans. Cool and slice each layer horizontally, making 4 layers.

Whip cream and fold in dry chocolate mix and cr?me de cacao. Ice each layer. Stack layers and ice top and sides with whipped cream mixture. Put in refrigerator for at least 6 to 8 hours.