• Preheat the oven to 350°F and grease a 15 x 10 inch jelly roll sheet pan with non stick cooking spray.
• Cream together the salted butter and sugar until light and fluffy.
• Add the eggs, one at a time beating well after each addition.
• Beat in the vanilla extract.
• Add the baking powder, baking soda, and one cup of flour and mix just until incorporated.
• Add remaining flour one cup at a time, mixing until its all incorporated.
• Spread or press the dough evenly into the greased pan. (Using your hands works the best).
• Bake the bars for 15-20 minutes until the edges are just starting to get golden brown and the center is no longer glossy.
• Let cool completely.

Buttercream Frosting

• Beat the butter until smooth and creamy.
• Add the powdered sugar one cup at a time, beating well.
• Add the vanilla extract and milk, beat together until smooth.
• Increase the speed to medium and beat until fluffy, about 1-2 minutes.
• Frost the cooled bars, decorate with your favorite sprinkles, cut into 24 bars and enjoy!