I multiply the recipe (1 cup peanut butter, 1 cup lard, 2 cups quick oats, 2 cups yellow cornmeal, 1 cup flour) times six every time I make it. So it takes a 40-oz. jar of peanut butter, plus an additional cup, about a third of a large bucket of lard, 12 cups of oats.A commenter mentions using the microwave to soften the mixture before stirring. Click the link above to see the birds enjoying this recipe.
It takes a lot of strength to mix it as it's setting up, and we've broken a couple of wooden spoons trying. I've got my drill down and can get the big batch done in under an hour now. Sometimes I wish I didn't have to make so much, but then I look out the window and realize that it's not much effort for the beauty it brings to our doorstep.
1 c peanut butter
1 c lard
2 c quick oats
2 c yellow cornmeal