I finally got around to making this recipe I found at Lowcarbfriends.
2 scoops vanilla protein powder
1 tbsp sugar-free instant vanilla pudding
1/4 tsp cinnamon
1/2 tsp imitation vanilla (or 1/4 tsp extract)
1 packet artificial sweetener (about 1 tsp Splenda)
a few dashes butter flavor sprinkles or butter-flavor extract
8 oz. water (or low-fat milk)
3 ice cubes
For the whole thing, I calculated:
4.5 g fat
24 g carbs
54 g protein
It's pretty good. I added some sugar free Davinci syrup, and it was almost too sweet. I might leave out the sweetener altogether next time, because the pudding mix is pre-sweetened. This will be great for those days I don't want to eat "real" food.