Once the cake and ganache have cooled, it's time to assemble: Place one of the cake layers. bottom-side up, onto a cake pan, or stand, and dump a heaping 1/4 cup of the ganache on top. Using a flat, metal spatula
, spread the ganache evenly over the top of the cake. Gently place the second layer, bottom-side up, on top of the ganache and refrigerate for about 15 minutes, or until the ganache filling just sets.