Pistachio Cake, Easy to Make and Deliciously Skinny...This is one of my “no time to bake cakes” since I’m starting with a cake mix. It’s all the other ingredients I’m adding that makes this cake skinny compared to a regular cake. And, it’s really yummy. The skinny for each slice, 228 calories, 5 grams of fat and 7 Weight Watchers POINTS PLUS. Here’s a quick tip-First bake, let cool and glaze. Cut into individual slices and freeze for a last minute treat.