Miniature Brownies
["1 c. butter or margarine", "12 oz. chocolate chips", "1 c. granulated sugar", "2 tsp. vanilla", "4 large eggs", "1 c. flour", "1 c. finely chopped walnuts"]
["Line 72 mini muffin tins with baking cups or arrange baking cups on cookie sheets.", "Melt butter in a 3-quart saucepan over medium heat.", "Add chocolate chips; stir until melted.", "Remove from heat.", "Stir in sugar and vanilla.", "Add eggs; stir briskly. Gradually stir in flour, then nuts.", "Fill baking cups 3/4 full. Bake for 22 to 24 minutes at 350\u00b0."]
["butter", "chocolate chips", "sugar", "vanilla", "eggs", "flour", "walnuts"]