My brownies were always hard on the edges, and raw and gooey in the middle. That was with the packaged mixes. Here is the Baker's One Bowl recipe, I am sure it will work for you! I do the full 35 minute bake time, and leave out the nuts.

One Bowl Brownies

4 squares Baker's Unsweetened Chocolate
3/4 cups (1 1/2 sticks) butter or margarine
2 cups sugar
3 eggs
1 teaspoon vanilla
1 cup flour
1 cup coarsely chopped nuts (optional)

Heat oven to 350 F (325 F for glass baking dish).
Line 13X9-inch baking pan with foil extending over edges
to form handles. Grease foil.

Microwave chocolate and butter in large microwavable bowl
on HIGH 2 minutes or until butter is melted. Stir until
chocolate is completely melted.

Stir sugar into chocolate mixture until well blended.
Mix in eggs and vanilla until well blended. Stir in flour
and nuts until well blended. Spread in prepared pan.

Bake for 30 to 35 minutes or until toothpick inserted into
center comes out with fudgy crumbs. Do NOT overbake.
Cool in pan. Lift out of pan onto cutting board. Cut
into squares.

Makes about 24 brownies