In the past (but just during the winter when it's cold), I have made a mixture of melted lard (I just put it in a large platic container and put it in the microwave til it melts...a minute or two), cornmeal, oatmeal, a container of cranberry/orange relish, and whatever else I have on hand to thicken it up in the way of raisins, fruit bits etc. You can always add some cracked corn, birdseed etc....oh, and peanut butter! (that's actually a main ingredient!)
Then I keep it covered in the cold garage, and use an old big spoon to pack the mix into the holes.
The birds are very happy to eat it!