Follow directions on the box for baking one Pillsbury Plus Devil's Food Cake.
Once cool, cut cake in half lengthwise into layers. Place 6 ounces of
chocolate ganache in each layer and spread. Add 2 cups of toffee pieces and spread evenly. Flip top layer into bottom layer and press gently to ensure cake is even. Spread remaining ganache over and around cake. Press remaining toffee pieces around the side of the cake. Sprinkle top with cocoa powder.
Directions for Chocolate Ganache:
Heat heavy cream to a boil in sauce pan. Once at a boil, remove from heat.
Add in chocolate chips. Whisk ingredients together until well blended and the chocolate chips have melted.