To prepare a sugar cookie with buttercream frosting recipe, you will first need to prepare the sugar cookies. You will need: 1 cup (240 g) sugar, 1 tablespoon (25 ml) butter, and 1 teaspoon (2.5 tsp) vanilla extract. Preheat the oven to 375 ?F (191 oC) and grease two 9-inch (23 cm) round baking pans with non-stick cooking spray. Sift together the flour, baking powder, salt and baking soda. Add the dry ingredients to the wet ingredients and mix until just combined. Pour the batter into the prepared pan and bake the cookies for 10 to 12 minutes or until the edges are golden brown. Remove from oven and allow to cool before frosting.