Homemade Thin Mints - Pankobunny

Ingredients

• ¾ cup unsalted butter (room temperature)
• 1 cup granulated sugar
• 1 large egg
• 1 tsp vanilla extract
• ½ tsp peppermint extract
• 1 ½ cups all-purpose flour
• ¾ cup cocoa powder
• 1 tsp baking powder
• 1/8 tsp salt
• 14 oz semi-sweet chocolate (melted)