why not just eat some chicken?
lol!
TN is good though, get a good whey iso and should mix into water with basically no taste, mild milky taste.
my favorite thing about protein powders is the taste!
you could use glycerin to sweeten things though and just add some coco powder or use good cooking extracts, vanilla extract for example or almond are both quite strong tasting... lemon...
I make all my chicken as plain as can be on the grill, then even when I don't want to eat its easy to cut up a chicken breast chew a piece and take a sip of water to swallow. not fun but gets the job done.