I just bought ingredients today to make some of the better suet. That's pretty much my recipe except I don't put in any sugar or cayenne. But I do toss in sunflower seeds or raisins or both.
I bought
these silicone molds from Amazon one year and they make it so easy to remove the frozen suet from them. The size is a bit too small, but I've seen them made into exact suet block sizes and the prices are ridiculous for those molds and I refuse to pay that. So I don't fill these all the way and they fit well enough for how easy it is to remove them.
Edit: Here's the right size for suet cakes, $20.00 each... no thanks.
https://youdoitsuet.com/buy-on...