A friend of mine makes the best.
Alberto’s Carnitas:
Here are the basic ingredients.If you google Pernil Asado you get a crap ton of different recipes, which I’ve tried a few, but I always go back to my old faithful. Here’s what I used on mines that I’ve been using for as long as I’ve been cooking that recipe.
Pork shoulder/Boston butt would also work. ~10-12lbs.
Olive Oil = Just enough to mash it with the garlic around ¼ cup or ½ cup depending on the size of the shoulder.
½ half head of garlic or around 6-8 cloves of garlic. I like enough garlic to send Dracula away for a while, but that’s your decision, the garlic really tones down once it cooks with the meat and gives it that kick ass flavor.
Peppercorns and or black pepper
Adobo (Goya brand) – Since I used both peppercorns and some ground black pepper I used the one without black pepper.
http://www.goya.com/english/product_subcategory/Condiments/Adobo
¼ cup of dried oregano.
There is not specific math or amounts on how much seasoning should be used, but it should be evenly coated when done. I take the olive oil and the garlic and I mash it together in a mortar and make it a paste , I poke holes in the shoulder and rub it with this oil / garlic paste until is evenly coated, add the dried oregano, the adobo, and peppercorns and black pepper to your taste.The trick is that once you have rubbed the meat, just put it in the fridge for 24 hours and let it sit.
For baking this all depends on the size of the shoulder you use. But 4hrs to 4 ½ hours at 300 degrees covered with foil, towards the end, remove cover and increase the temp to 400, for 15-20 minutes, to make the skin crispy( if you went with a pork shoulder that has the skin on top).
The trick on it is just let it marinate for 24 hours prior if at all possible