A perfect recipe for red, white, and blue chocolate and peanut M&M® candies.
Preheat oven to 350 degrees. Line a 12-inch round cookie pan with parchment paper.
Cream together butter, vanilla, sugars, salt, and baking soda; add egg then flour. Stir in 1/2 cup each chocolate and peanut butter M&M’s®.
Spread batter in pan. Top with remaining M&M® candies. Bake for 18-20 minutes, or until cookie is golden brown. Cool completely before decorating.