I get the fat free, sugar free Jello pudding mix. use fat free milk, blend it until it thickens then add a few scoops of vanilla isolate and mix a little more. portion it out and it's ready to go in 5 minutes in the fridge. Costs me nothing to make,
Sometimes I do egg whites with casein before bed sometimes. 5mins in the freezer makes it ice cream texture, too.
I like SF jello as well, but I just get the little cups of it.
Also, egg whites + casein make awesome pancakes. Nothing else needed, just those 2 ingredients (assuming the casein you have tastes good).