Hershey's Decadent Dark Chocolate Cake - 10 Stars! If you are looking for a chocolate recipe for Valentine's Day - look no further! This is an old Hershey's Chocolate recipe - I know this is my Grandmother and my Mom's old recipe. The twist is using the new powdered Dark Chocolate cocoa. This is one of the most MOIST cakes you will ever make. It is critical to use boiling hot water - do not miss this step.