01 -
Preheat the oven to 375ºF. Line a 14-inch deep round pizza pan with parchment paper and grease the entire pan, including the paper. Set aside.
02 -
In a large mixing bowl, cream the butter, brown sugar, and sugar until light and fluffy.
03 -
Add the eggs to the creamed mixture and mix until combined. Stir in the vanilla extract and mix well.
04 -
Gradually mix in the flour, baking soda, and salt until the dough forms and is fully incorporated.
05 -
Stir in the chocolate discs and 1/2 cup of M&Ms, reserving 3/4 cup for the topping.
06 -
Evenly spread the prepared dough into the lined pizza pan.
07 -
Bake the dough in the preheated oven for 20-25 minutes, or until golden brown. Remove from the oven.
08 -
While the cake is still warm, use the reserved M&Ms to decorate the top of the cookie cake.
09 -
Allow the cookie cake to cool completely in the pan before removing. Slice and serve as desired.