Cake Mix Cake Batter Cookies! Easy! by Cake Mix Cake Batter Cookies! Easy!So easy! Whip 1/2 cup butter, add 4 egg yolks and one full egg. Mix in one yellow cake mix a little at a time. Stir in sprinkles barely. Scoop with ice cream scoop and allow room to spread, bake at 325 for 17 min. Allow to cool for 2 min- then remove. They make giant delicious cookies