After it is baked, dump it onto a serving plate or platter, and using a long serrated knife, cut off the top if it is uneven (you’ll want to even layers so your lasagna isn’t lopsided).I had little helpers in the kitchen that enjoyed eating the uneven layers.
Then using the same knife, cut your cake into two layers, setting one aside for later.
In a bowl, mix together cream cheese, milk, powdered sugar, and cool whip. Spread half the mixture on top of the chocolate layer.