Chocolate Chip Cookie(Serves 12)  
["1 1/2 c. butter, softened", "1 1/2 c. granulated sugar", "3/4 c. firmly packed brown sugar", "4 eggs", "2 1/2 tsp. vanilla", "1 tsp. lemon juice", "3 c. all-purpose flour", "3/4 c. old-fashioned oatmeal (uncooked)", "3/4 tsp. baking soda", "1 tsp. salt", "1/4 tsp. ground cinnamon", "3 c. semi-sweet chocolate chips", "1 1/2 c. chopped walnuts"]
["Preheat oven to 375\u00b0.", "Line baking sheets with parchment paper.", "Place the butter in a large bowl and cream lightly with an electric mixer.", "Add the sugars and beat on medium speed for about 2 minutes.", "Add the eggs, one at a time, beating well after each addition.", "Add the vanilla and lemon juice and mix well."]
["butter", "sugar", "brown sugar", "eggs", "vanilla", "lemon juice", "all-purpose", "old-fashioned oatmeal", "baking soda", "salt", "ground cinnamon", "semi-sweet chocolate chips", "walnuts"]