Baker's One Bowl Brownies

These are the incredibly delicious brownies I made yesterday for Curt's SuperBowl party. From scratch, indeed. Yum! Yum!

Baker's One Bowl Brownies
4 squares BAKER'S Unsweetened Baking Chocolate
3/4 cups butter or margarine (1 1/2-sticks)
2 cups sugar
3 large eggs
1 teaspoon vanilla extract
1 cup all-purpose flour
1 cup pecans or walnuts, coarsely chopped (optional)

Adjust oven rack to center position and heat oven to 350 degrees F. Line 9- by 13-inch baking pan with foil, with ends of foil extending over sides of pan to form handles. Grease foil. Microwave chocolate and butter in large microwaveable bowl on High for 2 minutes or until butter is melted. Stir until chocolate is completely melted. Add sugar, stirring until well blended. Beat in eggs (one at a time) and vanilla until well blended. Add flour and nuts, and stir to incorporate. Stop stirring when no traces of flour remain. Spread in prepared pan.Bake for 30 to 33 minutes, or until toothpick inserted into center comes out with a few fudgy crumbs. Do NOT overbake. (It's better to underbake brownies than to overbake them.)
Cool in pan on wire rack. Remove brownies from pan, using foil handles. Cut into squares. Store in tightly covered container at room temperature or frozen for up to 2 months.. Makes about 24 brownies.