Cookie crust:
Preheat the oven to 300°F (150°C) and line a 12-inch pizza pan with parchment paper. In a large mixing bowl, combine the dry ingredients for the cookie crust. Stir in the wet ingredients until completely combined. Place the cookie mixture onto the lined pizza pan. Take another piece of parchment paper and place it over your cookie mixture. Begin pressing the cookie dough all the way to the pizza pan edges. Remove the top parchment sheet and place the cookie pizza in the oven and bake for 15 minutes. Set aside and let cool completely.

Icing:
In a medium-sized mixing bowl, combine all of the ingredients for the icing using a hand mixer. Mix until the icing comes out creamy and smooth.

Assembly:
Spread the cream cheese icing evenly over the cooled cookie. Then take your strawberries, blueberries, and raspberries and arrange them how you like on top of the icing. Slice into 12 servings.