Best Santa Cookies Recipe - How To Make Santa Cookies

Ingredients

• 3 c. (360 g.) all-purpose flour, plus more for rolling
• 1 tsp. baking powder
• 1/2 tsp. kosher salt
• 1 c. (2 sticks) unsalted butter, softened
• 1 c. (200 g.) granulated sugar
• 1 large egg
• 1 tbsp. whole milk
• 1 tsp. pure vanilla extract
• 5 c. (570 g.) powdered sugar
• 1/4 c. whole milk
• 1/2 tsp. pure vanilla extract
• 1/4 tsp. kosher salt
• Red food coloring, red sanding sugar, and red and brown mini M&M's, for decorating