Preheat oven to 350 degrees Fahrenheit.

In a large bowl, combine the devil's food cake mix, melted butter, and one egg.

Mix until well combined and a dough forms.

Press the cake mix mixture evenly into the bottom of a 9x13 inch glass baking dish.

In a separate bowl, beat the softened cream cheese and confectioners' sugar until smooth and light.

Add the remaining two eggs to the cream cheese mixture and mix until well combined.

Spread the cream cheese mixture evenly over the chocolate cake mix layer in the baking dish.

Sprinkle the chocolate morsels evenly over the top of the cream cheese layer.

Bake in the preheated oven for 40 minutes, or until the filling is set and the edges are golden brown.

Remove from oven and let cool completely before cutting into squares.

Cut into 12 equal squares and serve.