Step 1

Split each of the baked and cooled cakes in half length-wise. Set aside.**

Step 3

Make the frosting:

Step 5

In a large sauce pot mix together the cocoa powder and the sugar. Whisk in the milk. Stir constantly over medium high heat until mixture reaches 234ºF (softball stage). This can take up to 30-40 minutes.

Step 7

Remove from the stove and add the chocolate chips, marshmallows cream, and butter. Stir together until melted and smooth.

Step 9

Layer the frosting in between each layer of yellow cake. Frost the rest of the outside of the cake with the frosting.