Ingredients
Instructions
- Preheat oven to 350 and grease an 11x7 baking pan.
- Combine flours and powdered sugar; cut in butter until mixture resembles coase crumbs (mixture will seem powdery, but will come together while baking).
- Press mixture to bottom on baking pan and bake for 12 minutes.
- Meanwhile, gently combine sugars, flour, egg whites and vanilla. Stir in rhubarb.
- Pour mixture over warm crust and bake for 35-40 minutes until wooden pick comes out clean.
- Cool on wire rack, can be served warm.
- Store in refrigerator.