Quick Cookie Glaze

Ingredients not clear enough for newbie New to baking don't know what the 2-2 1/2 of warm water means! is that 2 cups 2 1/2 tablespoons of water oh well I just mixed water until got the right consistency yet it looks a little to brown because I used mexican vanilla extract lol. Pros: pretty would have been nice glaze if I can ever figure it out. Cons: not very clear on the instructions for warm water for a newbie.