01 -
Turn your oven to 375 degrees. Line a 14-inch deep round pizza pan with parchment paper, then grease the entire pan including the paper. This helps the cookie cake release easily.
02 -
In a large bowl, cream together the butter, brown sugar, and granulated sugar until light and fluffy. This takes about 2 to 3 minutes with a mixer.
03 -
Add the eggs one at a time, mixing well after each one. Then add the vanilla and mix until everything is combined.
04 -
Add the flour, baking soda, and salt to the bowl. Stir just until the dry ingredients are incorporated. Don't overmix or the cookie will be tough.
05 -
Stir in the chocolate discs and half a cup of the M&Ms. Save the remaining three-quarters cup of M&Ms for decorating the top later.
06 -
Spread the cookie dough evenly in your prepared pan. Use your hands or a spatula to get it nice and even all the way to the edges.
07 -
Bake for 20 to 25 minutes until the edges are golden brown and the center is set but still slightly soft. It'll firm up as it cools.
08 -
As soon as the cookie cake comes out of the oven, press the reserved M&Ms into the top while it's still warm. They'll stick better and look prettier this way.
09 -
Let the cookie cake cool completely in the pan. You can remove it to a serving platter if you want, or slice it right in the pan. Cut into wedges like a pizza and serve.