The Best Easy Brownies
["1 1/2 sticks butter", "18 oz. semi-sweet chocolate chips", "2 1/4 c. plain flour", "1 1/2 c. sugar", "1 1/2 tsp. vanilla", "3/4 tsp. baking powder", "3/4 tsp. salt", "3/4 c. nuts (pecans or English walnuts)", "4 eggs"]
["Heat oven to 350\u00b0.", "Grease a 13 x 9-inch pan.", "Melt butter and chips in saucepan over low heat.", "Then mix with spoon remaining ingredeints.", "Bake about 30 minutes or until center is set.", "Cool completely.", "Cut into 2-inch squares."]
["butter", "semi-sweet chocolate chips", "flour", "sugar", "vanilla", "baking powder", "salt", "nuts", "eggs"]