I happened upon this recipe from How Sweet it Is and it’s my new favorite idea. Just a spoonful of cake batter and a rainbow of sprinkles turns this holiday staple into a fantastic birthday treat. Perfect to give away as a party favor or packaged in a tin as a cheerful gift...
Cake Batter Chocolate Bark
6 ounces high quality dark chocolate
12 ounces high quality white chocolate
3 teaspoons yellow cake mix
sprinkles of your choice (at least 3 tablespoons worth or more)
Melt dark chocolate either in the microwave or a double boiler. Line a baking sheet with parchment paper and pour chocolate on. You can smooth it with a spatula to the thickness you desire. Stick in the freeze for 20 minutes.
Melt while chocolate. Whisk in cake mix slowly, stirring well until no lumps remain. Let it set for 3 full minutes (or at least until it slightly thickens). Remove baking sheet with chocolate from the freezer and immediately pour white chocolate on top. Sprinkle on sprinkles. Freeze for 20 minutes.
Once set, break into chunks. Keep refrigerated.
source: How Sweet It Is