Per layer of the cakes, on a separate bowls, let’s do the peanut butter cake first. Place dry ingredients in bowl, pour in wet ingredients, mix until completely combined. Pour into a square cake pan, bake until a line inserted in center comes out clean (about 25-35 mins depending on your oven)
Now for the chocolate layer. Do the same steps.
Once peanut butter cake is done, take it out of the oven, do not peel off parchment paper. However, for the chocolate cake, do peel off the paper.
Once both cakes are cooled to room temperature, prepare the ganache!
Heat heavy cream for a minute, on high, then stir in chocolate chips, until completely melted. Place in fridge for 10-15 minutes, take out, stir again, until spreadable consistency
Now, place back peanut butter cake into the cake pan, spread ganache, then top with chocolate cake.
Chill cake for at least 2 H, slice and serve