I make it often, but never measured anything. I use canned chick peas, drained and rinsed. I have also used dried peas, that I soaked for hours and then cooked.
I put a clove or more of garlic in food processor and run it, add the chick peas, squeezed lemon, salt, cumin, olive oil- just a bit. Purée it all. If I have an avocado on hand,I will add half, so good. The seasonings really depend on how much you prefer. Enjoy.