Wash, core, and chop enough apples to fill your instant pot. Add 2 cups of sugar, 2 tablespoons of cinnamon, 1 teaspoon of ground allspice, and 1 teaspoon of ground cloves. Mix with the apples. Add your lid, set the timer for 10 hours, select the "slow cook" or "crock pot" function, set your lid to "vent" mode, and select "low" heat and the "keep warm" option.
After 10 hours, take your lid off and stir your apples. Add more washed, cored, and chopped apples (or apple pulp leftover from making apple juice and apple jelly) to fill your pot back up again. Add another 1 tablespoon of cinnamon, 1 teaspoon of ground allspice, and 1 teaspoon of ground cloves.
After another 10 hours (20 hours into the process), take your lid off and stir your apples. Add more washed, cored, and chopped apples to fill your pot back up again. Add more spices to taste. Set your lid back on and set the timer for another 10 hours on "low."
After yet another 10 hours (30 hours into the process), take your lid off and stir your apples. Use your immersion blender to blend your apple butter to the consistency and texture that you want. Be careful not to blend so much that you liquefy your apple butter, though. If your apple butter still has too much juice in it, continue cooking on low heat for another 5 to 10 hours until it's the consistency that you want. Alternatively, if it's too dry, add water or apple juice.
Taste your finished apple butter and add more spices to taste.