This is a Betty Crocker recipe. You can see the recipe here. They are very sweet but I think they turned out great.
1 box brownie mix & ingredients for brownies
1/2 cup whipping cream
6 tablespoons butter
1 1/2 cups packed brown sugar
1/2 cup chopped pecans, toasted
1 1/2 cups powdered sugar
1 teaspoon vanilla
Cook brownies according to package directions in a 9x13 pan. Allow to cool. In medium saucepan, mix cream, butter and brown sugar. Cook over medium heat, stirring frequently, until mixture comes to a boil. Continue cooking 1 minute, stirring constantly. Remove from heat. Stir in pecans, powdered sugar and vanilla. Cool 5 minutes, stirring frequently. Spread frosting over brownies. Allow to stand 30 to 45 minutes, or until frosting is set.