Combine first 3 ingredients in a medium bowl; stir well. Set flour mixture aside.
Combine sugar, shortening, and water in a medium saucepan. Bring to a boil over medium heat, stirring constantly; remove from heat. Add chocolate morsels and vanilla, stirring until smooth. Add eggs, one at a time, stirring after each addition. Add dry ingredients and walnuts; stir well. Spoon into a greased 9-inch square pan. Bake at 325° for 30 minutes or until a wooden pick inserted in center comes out clean.
Sprinkle bourbon evenly over warm brownies. Let cool completely in pan on a wire rack. Spread White Frosting on top of brownies. Pour warm Chocolate Glaze over frosting. Let stand until set. Cut into squares.
To Market, To Market, The Junior League of Owensboro, Inc., Owensboro, Kentucky