Preheat oven to 400 degrees. Spray a 12 inch pizza sheet lightly with cooking spray. Set aside.
Roll the pizza dough into a 12-inch circle and place it on top of the pizza pan. If you want the dough to be thinner, divide it in half and use the other half for pizza. Once it is in the pizza pan, let it rest for 10 minutes.
In a small bowl combine butter, brown sugar, oats, and cinnamon. Spread thinly on top of the pizza crust. Sprinkle with additional brown sugar if desired. Bake for 12-15 minutes or until the edges are light brown.
Beat together butter and cream cheese. Add powdered sugar and vanilla until combined. If it is thick, put it in the microwave to soften it up. Drizzle on top of the pizza.
