كوكيز الفانيلا

25 grams (1 cup) Unsalted Butter 200 grams (1 cup)Granulated Sugar 2 tsp Vanilla Extract 1 egg 1 tsp Orange/Lemon Zest (optional) 440 grams (3.5 cups) All Purpose Flour 1 tsp Baking Powder 1/4 tsp Salt