If you want to prepare the recipe the original way, you will need a molcajete or mortar and pestle. I ground the cumin seeds and peppercorns, added the sliced garlic and ground until I had a paste. I then added the chipotles and continued working them in to form a thick paste. Mix in the juice of 1/2 a lemon and add salt to taste. In a pinch, I sometimes use knorr tomato chicken bouillon to make a quick chicken broth. Just be aware it has salt.