This recipe is from Season 3 of 5 Ingredient Fix
Cook's Note: If the chocolate mixture gets too firm to pipe, warm it briefly over the simmering water in the bowl to loosen. If you have already transferred it to a piping bag, simply wrap your hands around the bag and hold it for a few minutes. The residual heat from your hands will soften the chocolate until it is easy to pipe. Makes about 3 dozen mini sandwiches.