Combine all ingredients in a mixing bowl except the candy bars. Mix on low to incorporate ingredients. Mix on medium high, scraping bowl. Mix for 2 1/2 minutes. Stir in chocolate chips. Batter will be very thick.
Prepare 2-9 inch pans with cooking spray. Divide the batter between both pans.
Cook for 35-40 or until tooth pick comes out clean. Allow to cool for 10 minutes on a cooling rack. Turn over and cool completely.
Assembly: frost 1/2 the cake and place 1 cup of candy bar chopped. Place other layer on to cake doing the same with the chopped candy. Frost sides. Place a whole candy bar all around the cake leaving spaces. Keep in fridge...