Trim fat from meat of your choice and discard.
In a large heavy pan over medium heat, place meat; cover with water and simmer until the meat is tender. Remove from heat and refrigerate meat in the cooking liquid overnight.
Remove from refrigerator and remove meat from liquid. Remove all fat from top of liquid; discard the fat and reserve the remaining liquid. Separate meat from bones, discard bones. Chop cooked meat into small cubes.
In a large pot, combine meat cubes, beef suet, apples, reserved liquid, sugar, apple cider, molasses, cider vinegar, raisins, cinnamon, cloves, allspice, nutmeg, lemon juice, and orange juice; simmer for 2 hours. remove from heat. Add brandy or sherry and mix together.
It is best to let mincemeat stand at least a couple of weeks before using. I store mine in the refrigerator. Freeze in air-tight containers for longer storage.
* Suet is a solid while animal fat. The best Suet comes from the fat that grows around the kidneys in cows and sheep. You can purchase packages of suet from your local butcher or from the meat department of your local grocery store. It then needs to be coarsely grated to make it ready to use. It also must be kept refrigerated prior to use and used within a few days of purchase, just like meat. You can also substite lard, shortening, butter, or bacon fat.
Grandma's Homemade Mincemeat Recipe: https://whatscookingamerica.net/mincemeatgrandma.htm