Best St. Patrick's Day Cookie Recipe - How To Make St. Patrick's Day Cookies

Ingredients

• 3 c. all-purpose flour, plus more for surface
• 1 tsp. baking powder
• 1/2 tsp. kosher salt
• 1 c. (2 sticks) butter, softened
• 1 c. granulated sugar
• 1 large egg
• 1 tbsp. milk
• 1 tsp. pure vanilla extract
• 5 c. powdered sugar
• 1/3 c. light corn syrup
• 1/4 c. milk, plus more for thinning
• 1/4 tsp. almond extract (or vanilla)
• Green food coloring