Cut excess skin and fat from under side of shoulder
You only need the top part of the skin and fat.
Score the skin
In some of the slits poke holes to put garlic pieces into
Rough chop garlic and place in holes
How to make rub
Add chile powder, salt, pepper and oregano florets to a bowl
On low heat roast cumin seeds and chipotle chile
Roast till cumin gets smokey and chipotle dries out
The jarred chipotle is little sticky thats why you want to roast it.
Also it give is even more smokiness.
Grind cumin seeds and chipotle chiles in mortar and pestle
Add ground cumin and chipotle into bowl with the rest of the rub
Give it a stir and crush the oregano florets
Rub the spices into the scored parts of the pork
Drizzle roasting pan with olive oil
Place pork in oven for 5 - 6 hours
After about 2 hours place a sheet of foil over pork till its done.
It should fall apart with touch and or fork.
Notes
I mentioned two ways to cook a pork shoulder. Here you have the oven version. The crock pot version is just as simple, just cut off all the skin. If left on it will be super chewy and not at all appetizing. Next use the same rub but just add it to the pot, you may want to increase the amount and add a bay leaf. Also still you can still poke holes into the meat and put garlic in them. Or rough chop the garlic and add it like the spices. Also you will need water to keep it from drying out. Adding a little orange citrus is nice, but not necessary.
* You should treat this like you would a regular roast*
Recipe by House of Zeta at https://houseofzeta.com/spice-rubbed-pork-shoulder/