Serious Eats: Talk

Chocolate Cake Filling

I need to make a birthday cake for Saturday. Request was for a peace sign, so I've ordered a peace sign cake mold. It will be the top layer of a three layer chocolate cake. Either the body or the peace layer will be covered with fondant, because I want a tie-dye/swirly effect.
Does anyone have a recipe for a chocolate filling that doesn't require refrigeration?

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