Chocolate Chip Brownies
["2 3/4 c. flour", "1 tsp. baking soda", "1 tsp. salt", "1 c. margarine or butter, softened", "3/4 c. sugar", "3/4 c. firmly packed brown sugar", "1 tsp. vanilla", "2 eggs", "1 to 1 1/2 c. chocolate chips", "chopped nuts (optional)"]
["Preheat oven to 350\u00b0.", "Spray 9 x 13-inch baking pan with vegetable cooking spray.", "In separate bowl, combine flour, baking soda and salt.", "Set aside.", "In a large bowl, mix margarine, sugar, brown sugar and vanilla.", "Beat until creamy.", "Beat in eggs.", "Add flour mixture and mix well.", "Mix in chocolate chips and nuts.", "Bake at 350\u00b0 for about 30 minutes.", "Cool and cut into squares of desired size."]
["flour", "baking soda", "salt", "margarine", "sugar", "brown sugar", "vanilla", "eggs", "chocolate chips", "nuts"]