Preheat oven to 350 degrees. Butter a rimmed 12-inch pizza pan (without holes), line with a round of parchment paper and butter parchment paper.
For the cookie dough crust: in a medium mixing bowl whisk together flour, baking powder, baking soda and salt.
in the bowl of an electric stand mixer cream together 3/4 cup granulated sugar and butter until well combined. Scrape down bowl.
Mix in egg, then blend in 2 tsp vanilla extract
add four mixture then blend jsut until combined.
Drop batter onto prepared pizza pan, then spread into an even layer with hands coated in non-stick cooking spray.
Bake in preheated oven about 11-13 minutes until just baked through.
Remove from oven and let cool completely on a wire rack.