Step 1

To begin, preheat your oven to 350 and spray a round 15" pizza pan with no stick spray (or use a stone pan).

Step 2

In a large mixing bowl, add your butter and sugars and cream them together with a hand mixer for a couple minutes. Add in your egg and vanilla and lightly blend it together again.

Step 3

In a separate mixing bowl, add your dry ingredients and stir them together (flour, cornstarch, baking soda and salt).

Step 4

Pour your dry ingredients into your wet ingredients and stir/fold them together till you have one consistent, thick cookie dough. Add your chocolate chips and sprinkles and fold them into your batter.

Step 5

Dump your cookie dough onto your pan and gently work the dough and spread it out into one, thin, even layer, leaving 2 inches of pan showing all around the edge (as the cookie pizza will spread while it bakes). You can press extra chocolate chips and sprinkles on top of the dough prior to baking too, for an extra pretty cookie pizza.

Step 6

Bake in the oven for 15-18 minutes, or till the edges are set and the middle looks a little underdone. The middle may also be a little raised, but should settle down as it cools.

Step 7

Remove, and let cool entirely.

Step 8

Frost around the edges, and add extra sprinkles on top of the frosting. Slice, and serve! Devour.