Slice apples to 1/8" to 1/4" thickness with knife or mandolin. Even slices preferred for even baking.
Place in bag and sprinkle cinnamon on top. Toss gently.
Place slices on parchment-lined baking sheet. Do not overlap.
Bake for 40 minutes. If beginning to brown after 40 minutes, flip slices over. If not, continue baking for 20 additional minutes, then flip slices.
Bake for 40 minutes on second side or until medium-dark brown.
Turn off oven. Remove baking sheets after 20 minutes.
Notes
Store in airtight container for one week to keep them crisp.Every oven is different - make sure to test your chips to make sure they are crispy before you stop cooking them.