Fudgy Oat Brownies

1 1/2 cups quick cooking oats
3/4 cup flour
3/4 cup brown sugar
1/4 teaspoon baking soda
3/4 cup butter, melted
1 package fudge brownie mix(13-inch x 9-inch pan size)

3 tablespoons butter
1 1/2 squares (1 1/2 ounces) unsweetened chocolate, chopped
2 1/4 cups confectioner's sugar
3 to 4 teaspoons hot water
1 1/2 teaspoons vanilla

In a bowl, combine oats, flour, brown sugar, baking soda and salt. Stir in butter until combined. Press into an ungreased 13-in x 9-in. x 2-in. baking pan. Bake at 350 degrees for 10-11 minutes or until puffed and edges are lightly browned.

Meanwhile, prepare the brownie mix according to package directions for cake like brownies.
Spread the batter over crust. Bake 25 to 30 minutes longer or until a toothpick inserted in the middle comes out clean.

For frosting, in a small saucepan, melt butter and chocolate over low heat stir until smooth. Remove from heat; immediately stir in the confectioner's sugar; 2 tablespoons water and vanilla until smooth. Add the remaining water; stir until smooth. Immediately spread over brownies. Cool on wire rack until firm. cut into bars.