Ingredients
1 1/2 c. (3 sticks) butter, softened
1 c. granulated sugar
1 c. brown sugar
2 large eggs
2 tsp. pure vanilla extract
4 c. all-purpose flour
2 tsp. baking powder
1 1/2 tsp. baking soda
2 tsp. kosher salt
4 c. chocolate chips
2 c. (4 sticks) butter, softened
8 c. powdered sugar
2 tsp. pure vanilla extract
1/4 tsp. kosher salt
1/2 c. heavy cream
Red and blue food coloring
Preparation
Step 1Make cookie: Preheat oven to 350°F and line a large baking sheet with parchment paper. In a large bowl using a hand mixer or in the bowl of a stand mixer, beat together butter and sugars until light and fluffy. Add eggs and vanilla and beat until combined. Step 2In another large bowl, stir together flour, baking powder, baking soda, and salt. Add dry ingredients to wet ingredients and beat just until combined. Fold in chocolate chips. Step 3Place dough on baking sheet and form into a large circle, about 12 inches wide. Bake until almost set in the middle, 30 minutes (it will continue to set as it cools, so don’t overbake it!). Let cool completely. Step 4Meanwhile, make buttercream: In a large bowl using a hand mixer or in the bowl of a stand mixer, beat butter until smooth. Scrape down the sides with a spatula, add powdered sugar, and beat until smooth. Add vanilla, salt, and heavy cream and beat until well combined. Step 5Divide frosting into three medium bowls (you’ll need about half for the red; a quarter each for blue and white). Dye one bowl red, one bowl blue, and keep the third white. Step 6Pipe buttercream: Transfer white frosting to a piping bag fitted with a small open star tip. Using a star cookie cutter as a guide, pipe dots to form a star in the middle of the cookie cake.Step 7Transfer blue frosting to a piping bag fitted with a small open star tip. Pipe dots to form a circle around the star, filling in the triangles of the star as well. Step 8Transfer red frosting to a piping bag fitted with a medium open star tip. Pipe small dots to form 2 red frosting circles around the blue, then pipe 2 circles of white around the red. Finish with 3 circles of red around the white.
