Can i add coffee grounds to my vegetable garden?

I have a small porch garden. I have small pots with my Veggies growing. I am new to gardening, i have been reading alot about coffee grounds and how they are good for plants. I just need to know if it would be a good idea to mix some used ground in the top soil of my plants? Im growing pumpkins,cucumber,zucchini,carrots and raspberries also a window herb garden. All my plants have sprouted.