How to Freeze Apples: The Short Answer
Peel, core, and slice your apples into even pieces. Soak the slices in a lemon water bath for a few minutes to slow browning, then lay them flat on a parchment-lined baking sheet and freeze solid for one to two hours. Transfer the individually frozen slices to labeled airtight freezer bags, squeeze out the air, and store at 0°F or below for up to 12 months.
That's the core of how to freeze apples. The sections below cover the details that make a real difference — which varieties hold up after thawing, how to keep slices from clumping into an unusable block, and what you can and can't do with them once they come out of the freezer in January.