01 - In a large, heavy-bottomed pot, combine chopped apples, lemon juice, apple cider, and water. Bring to a simmer over medium heat and cook, stirring occasionally, for approximately 10 minutes until the apples become tender.
02 - Slightly mash the cooked apples using a potato masher or immersion blender, leaving a few small chunks for texture.
03 - Add granulated sugar, brown sugar, cinnamon, nutmeg, allspice, and salt to the apple mixture. Stir well until the sugars are fully dissolved.
04 - Add butter cubes and continue cooking over medium heat, stirring frequently, until the mixture thickens and exhibits a golden caramel color, about 20 to 25 minutes. Stir gently and scrape the bottom regularly to prevent scorching.
05 - Bring the mixture to a rolling boil. Add liquid pectin, stir thoroughly, and boil hard for 1 to 2 minutes. Remove immediately from heat.
06 - Skim any foam from the surface. Ladle hot jam into sterilized jars, maintaining 1/4-inch headspace. Wipe rims, affix lids, and process jars in a boiling water bath for 10 minutes (increase time for higher altitudes if necessary).
07 - Allow jars to cool completely at room temperature. Store in a cool, dark location and refrigerate after opening.