Birthday Cookie Brookies Birthday Cookie Brookies Ingredients Cookie Dough 75g Soft Butter 100g Light Brown Sugar 45g Caster Sugar 1 Egg 1 Egg Yolk 145g All Purpose Flour ¼ tsp Salt ½ tsp Vanilla 40g Sprinkles 100g High Quality White Choc Chips Brownie: 220g Dark Chocolate 220g Butter 440g Caster Sugar 4 Eggs 60g Cocoa