Got tired of buying the stuff since the majority of it ends up in in squirrel bellies, so I started making my own about 5 years ago. Here’s my recipe (makes 4 4"x5" blocks):
Melt lard/peanut butter (microwave 3 min), mix in the rest, pour it out in a flat container about 1" deep and put it in the freezer. Once it’s solid you can put it out for the critters or wrap it up for later use. I’ve “borrowed” some 5"x9" plastic tubs from my wife that are perfect; pop out the frozen suet, cut in half (width-wise) and they fit perfectly in the suet cage I have set out.
A flicker (yellow-shafted) showed up at the suet feeder this morning - first of the year (seen) and fourth different woodpecker this week, adding to the Downy, Red-belly and Sapsucker. Jays, starlings, crows, sparrows, even a very confused yellow-rumped warbler seem to like it.
Scott, I buy hot spiced suet at Walmart and the birds eat it up, the squirrels do not touch it at all. We have succeeded in squirrel proofing most of out feeders. We have one tube feed that a young squirrel gets on once and then the learn Newton’s Third Law of Physics when the feeder swings out from under them and they fall 15 ft. instead of reaching the railing on the deck.
Added some cayenne, hot chili powder and a dash of hot sauce. Squirrels don’t seem to like it; birds don’t seem to notice the difference (a pair of flickers are working it over as I type this). Thanks everyone for the suggestions.
Pepper flakes may not infuse (watching way too many cooking shows) with enough spice; I’m thinking the finer ground cayenne and chili powder are doing the trick. I skipped the hot sauce on the latest batch and the squirrels are still giving it a wide berth while the birds feast.
The wife got tired of me depleting her spice rack so I grabbed a bottle of sriracha hot chili sauce and squirted some in the mixture. Squirrels don’t seem to have the stomach for it; birds don’t seem to care. The sriracha is cheap and it only takes a little bit, so I think I’ve got a leg up on the rodents for the time being.