This recipe was found off allrecipes.com I tweaked the recipe a little to make it more my own, but it's super easy to make. If you're a chocolate-lover then you're just going to have to try this recipe. If you don't want to use a cake mix, you can also use a brownie mix too.
1 (18.25 ounce) package devil's food cake mix
1 cup chocolate syrup
2 (3.9 ounce) packages instant chocolate pudding mix
8 candy bars (whatever your favorite are)
1 (16 ounce) package frozen whipped topping, thawed
Bake cake in 9x13 inch pan according to the manufacturer's instructions. While the cake is baking, prepare the instant pudding according to instructions on box, set aside to chill.
When the cake comes out of the oven, punch holes in the cake with a fork. Pour the chocolate syrup over the top of the entire cake. Using a fork, crumble the cake into smaller pieces. In a large bowl, put a layer of cake on the bottom, then cover with a layer of pudding. Then spread a layer of whipped topping, then sprinkle some of the crushed candy bars. Repeat the layers to the top of the bowl, ending with the candy bars on top. Refrigerate until serving time.