I'd actually keep up the "baby talk" to be honest. If I had my time over I would have worried more about my son's speech and I wish I'd "dumbed down" my talking earlier to help him. He's 3.5 and I'm being told to talk to him in one and two word sentences when possible. I should have been doing that 2 years ago! I'd say things like "Drink! Here it is". Offer lots of clear one word names for things. Then you can add the descriptors like you're doing. "Cup. Blue cup", "Apple. Yummy apple" etc. If she is pointing and using joint attention (look at you, look at the item etc) then I wouldn't stress though.
My DD2 had speech therapy and her speechie couldn't stress enough how important it was to NOT talk the way they did or talk like a baby to them. Speaking to them in short sentences is fine if they have a problem with comprehension etc, but if they say 'dink' for 'drink' always say 'drink'.

HotI, just keep talking to her all the time. Use words as much as you can. If she tends to point things out to you that she wants, always say what it is and not just give it to her kwim? And reading is wonderful for helping them pick up words as well. So you are doing all the things that will help her eventually gain words. She is still only little and at her age I wouldn't be overly worried unless there were other things as well, like not understanding you or not being able to follow simple instructions etc. If she had trouble in those areas, then I would be alert (not alarmed about it) but as it stands, it sounds like the only thing you're worried about is her lack of words, but give her time and they will come