Please choose the correct solution to the question: How to Make Classic Buttercream Frosting

Solution1: To make Classic Buttercream frosting, put 1 cup of softened unsalted butter into a mixing bowl. Sift into the butter 4 cups of confectioners sugar. Beat with a hand mixer, add in 2 teaspoons vanilla extract and 2-3 tablespoons of powdered milk until frosting reaches desired consistency.

Solution2: To make Classic Buttercream frosting, put 1 cup of softened unsalted butter into a mixing bowl. Sift into the butter 4 cups of confectioners sugar. Beat with a hand mixer, add in 2 teaspoons vanilla extract and 2-3 tablespoons of milk until frosting reaches desired consistency.

Answer format: solution1/solution2
Answer: solution2