Old Fashioned Sugar Cookies
["1/2 c. butter", "1 c. sugar", "1 egg or 2 yolks", "1 Tbsp. cream or milk", "1/2 tsp. vanilla", "1/2 tsp. salt", "1 tsp. baking powder", "1 1/2 c. flour"]
["For richer cookies, increase butter to 1 cup and add 1 egg yolk."]
["butter", "sugar", "egg", "cream", "vanilla", "salt", "baking powder", "flour"]