Chilies: Use dry mild chilies like Guajillo and Pasilla Chiles to add flavor and depth – but not too much heat. (Feel free to use other dried chilies, paying attention to heat level.) Add Chipotle for more heat and smoky flavor. If you want a milder stew, I suggest using only Guajillos (like 6). You can always add more spice at the end (cayenne, chili flakes, chipotle powder) if not sure. Using dried chilies really makes this dish.
If you prefer a brothier stew, you can always add more chicken or beef broth at the end of cooking, seasoning with a little more salt.
MEAT: I used a mixture of lamb and beef. Tougher cuts of meat work great here like stew meat. Shoulder, shank, leg, etc. Goat meat is traditional.
To Remove Fat: Make the stew ahead and cool – the fat will solidify at the top and then can be easily removed.