Crust: Using a fork or pastry cutter, mix the flour, powdered sugar and butter until well blended. OR add flour and powdered sugar to a food processor. Cut the butter into chunks and pulse in until crumbly. Works slick and my preferred method!

Press crumb mixture into a 9 x 13" pan. Bake at 350 degrees for 15-20 minutes.

While crust is baking, mix all of the above topping ingredients in a blender (or use a hand mixer); pour over crust. Reduce oven temp to 325 degrees and bake for 25 minutes.

Cool and sprinkle with powdered sugar. Cut into squares.