This cake was AWESOME! I used frozen mixed blackberries, raspberries and blueberries. I layered and didn't mix anything just like the directions said. I did use the walnuts but I used diet cherry 7-up. I was a little concerned when it came out of the oven because there were a few spots of cake powder where the soda didn't quite cover the cake. But I topped it with lite cool whip and hoped for the best. EVERYONE loved it! It came out juicy and sweet and rich tasting. This will be my new go-to for a quick and easy dessert, diet or not.