These birthday cake cookies are just like your favorite funfetti cake, just made into cookies! They’re buttery sugar cookies filled with sprinkles, topped with vanilla frosting.
Using a large cookie scoop, scoop about 3 tablespoons (45 ml) of cake batter cookie dough onto a lined baking sheet. Bake the birthday cake cookies for 12 - 14 minutes.
Beat the softened butter with powdered sugar, vanilla extract, heavy cream and salt until well combined. Beat for 3 - 4 minutes until the frosting is light and fluffy.