Mushroom Cookies Recipe - (4/5)

Ingredients

• 1/2 stick unsalted butter, room temperature
• 1/2 cup sugar
• 1 egg, room temperature
• 1 teaspoon vanilla extract
• 1 1/2 cups corn starch
• 1/2 cup plain flour, all purpose
• 1 teaspoon baking powder
• 4 tablespoons cocoa