I've got the 5.0.1 android Lollipop update recently and for the life of me i can't figure out how to create a folder in the app drawer. It used to be just dragging the app over another (on Kitkat) but for some reason it doesn't work with lollipop.
If someone's figured it out please let me know :)
You never could create folders in the app drawer on stock unrooted Android.
Perhaps you're talking about the home screen? In that case, it's the same as always! not sure why it's not working for you.