Mix cake according to package. I used a Strawberry cake mix which used the mix 3 eggs, 1/3 Cup oil, 1 cup water and bake at 350 degrees for 32-36 min for 13x9 inch pan. Allow to cool.
In a large bowl, spoon the cake and all but 2 tablespoons of the frosting (keep for decoration).
With a potato masher or large spoon, mash the icing and the cake mixture together until it is sticky.
In the bottom of a heart shaped mold (or sprinkle cookie sheet if spooning into a cookie cutter) sprinkle candy hearts , sugar or chocolate sprinkles. I got my mold from Dollar Tree and I only used one and repeated the process.
Spoon dough into the mold (or spoon onto cookie sheet and cut with cookie cutter). Place in freezer for approximately 10 minutes.
Line a 13x9 pan with was paper. Remove from mold (if mold used); flip right side up.
Spoon 2 tablespoons of frosting into a ziplock bag and close it. Smoosh it to one corner than make a small snip in the corner and squiggle it over the hearts.
After there are icing squiggles on the hearts, place pan in the freezer for 10 minutes before putting on serving plate to make it easier to work with (otherwise will be smooshy).