How much work do you want to put in?
100g UU in 100ml apple juice then 300ml water is simple and reminds me of something between oatmeal and apple cobbler.
I also use chai tea powder (still using the apple juice for a little sweet) and that doesn’t remind me of anything but chai.
Also PB2 peanut butter powder.
I do not recommend orange juice as a sweetener, though if you try it anyway (even bad combinations are novelty) make a half-serving with a chaser of coffee or something.