1. Preheat oven to 180ºC . In an 8or 23 cm square pan, stir together Basic Brownie Mix, eggs, vanilla, and nuts until dry ingredients are well moistened.
2. Bake until a toothpick inserted in the center comes out barely moist, 20 to 25 minutes. Do not overbake.
3. Cool brownies on a wire rack, then cut into squares.
Double Chocolate Brownies: Stir 1 package (6 oz) semisweet chocolate chips into the batter.
Quick-Iced Brownies: Break up 1 or 2 milk chocolate bars into squares. After removing brownies from oven, place chocolate pieces on top and spread chocolate as it melts.
Microwave Version 1. In an 8or 23 cm square glass dish, stir together Basic Brownie Mix, eggs, vanilla, and nuts until dry ingredients are well moistened.
2. Shield corners of dish with aluminum foil. Microwave on 70% power 10 to dozen minutes, rotating dish, if necessary, for even doneness. Brownies are done when a toothpick inserted in center comes out barely moist. Remove foil shields the last 2 minutes of cooking.
3. Cool brownies on a wire rack, then cut into squares.