I made this Crisp recipe this morning using lovely blackberries from my Father's intended's yard. I used fat-free store brand mayo so I could eat it and still stay within my diet guidelines. It came out doughier than it would have had I used the full-fat variety, but was very good none-the-less. A bit of fat-free Cool Whip was good with it. (not on the diet tho!)-Micha