Okay, I just invented this and I thought it tasted pretty darn good - and it's nice and cool for this icky, humid weather. Even my 4 year old wandered off with a glass of it.
3/4 c. FF milk
1 tbsp. ricotta
1/3 c. ff plain yogurt
3 tsp. Splenda
3 tsp. vanilla extract
Optional: 1 tbs. fiber
Plop it all in the blender and blend until smooth. It will not be thick, but if you add several ice cubes, it will be nice a cold and refreshing.
We drank it right away, but let me know if you try it frozen. I'm curious how it would turn out.
Btw, this was my afternoon snack.