Heat oven to 350 degrees.
In a large bowl, combine 1 1/2 cups flour and the white sugar. Cut in the *cold* butter until mixture is crumbly.
Press on the bottom of an ungreased 13 x 9 inch baking pan.
Bake for 15 minutes or until edges are lightly browned. Remove from oven. Set aside.
In the large bowl, combine all of the ingredients for the topping and mix well.
Spread over hot, partially baked crust.
Place back into oven and bake for 25 - 30 minutes or until golden brown.
Cool completely before cutting into bars.
recipe from family