I won't use commercial lard in my tamales after trying Rick Bayless's recipe...
...for rendering lard at home.
It's easy, and the lard you get is so much tastier. It really makes a difference in the flavor of the masa. My thinking is that if you are going to eat lard at all, shouldn't it be the "good stuff"?
Here's Rick Bayless's instructions:
2 lb pork fat, cut into 1 inch cubes ( do not use bacon or salt pork)
Directions
Preheat oven to 275 deg F. Spread the cubes out in a deep baking dish, place in oven.
Stir every once in a while as the fat renders into a clear liquid.
When the baking dish contains only clear liquid and browned bits (about 2 hours), carefully remove the dish from the oven (letting the cracklings color richly gives the lard a fuller, roastier flavor).
Let the lard cool to lukewarm, then strain.
Store the lard in a tightly sealed jar in the refrigerator (freeze if you won't use it all within a month).
MY NOTES:
I get packages of trimmed pork fat from the markets that cater to mostly latino neighborhoods here in Phoenix. Don't hesitate to ask your neighborhood meat guy to save some for you if you don't see it in the meat case. Find out when they recieve their pork shipment each week. Usually they cut and package the meat the same day and the fat is available then.
I use sheet pans, mainly because I can fit two at a time in my oven and render more lard. The sides are low, so I have to be very careful when I move them in and out of the oven.
I strain the lard through a medium sieve. I keep it in the fridge in quart mason jars.
Keep in mind, rendered lard has less saturated fat than butter! Lard is not evil. Maybe a little pig-headed, but not evil!
Michael