Bisquick Butterscotch Brownies

2 cups Bisquick baking mix
1 box light or dark brown sugar
4 large eggs
1 stick (1/2 cup) margarine, at room temperature
1 can coconut
1 1/2 cups chopped pecans
1 teaspoon vanilla extract

Heat oven to 350 degrees F. Mix all ingredients and bake in a 9 x 13-inch pan for 45 minutes. Cool on rack, and cut while still warm.