In a large bowl mix sugar, butter and egg with an electric mixer or by hand with a large spoon. When creamy, add the remaining ingredients and mix together well. Cover the bowl with plastic wrap and refrigerate for 2 ½ hours. Spray a 12-inch pizza pan with non-stick cooking spray. Preheat oven to 375 degrees. Remove batter from fridge and press evenly into the pizza pan. Bake for 20-25 minutes or until slightly brown and a toothpick inserted in the middle comes out clean. Let cool completely and then frost with buttercream frosting. Arrange fruit of your choice on top.
3 cups powdered/confectioner’s sugar
Mix powdered/confectioner’s sugar and butter together with a large spoon. Stir in vanilla and milk and beat by hand or with an electric mixer until smooth. If frosting is too stiff, then add milk a little bit at a time until it gets to the desired consistency. Spread frosting evenly on the “fruit pizza” with a knife or spatula.