Put desired number of cinnamon sticks in a tea bag or tied cheese cloth sack.
In a large-sized, non-reactive pot, combine cider, schnapps, lemon juice, cinnamon bag, and sugar. Over high heat, bring to a hard boil while stirring regularly for 7-10 minutes. Add liquid pectin.
Return to a hard boil, stirring regularly until consistency has thickened. At this point the bubbles should look shinny and syrupy.
Taste! If peppermint flavor isnt strong enough, add peppermint extract (CAREFUL this stuff is strong).
Test the jelly set using the saucer test: freeze saucer for 15 minutes, drop 1tsp of jelly on saucer then put in fridge/freezer for 1 minute, nudge the edge of jelly drop, should wrinkle if set.
Remove cinnamon bag.
Pour jelly into prepared (hot and sterilized) jars, wipe rims, apply lids and rings (finger tight), then process in a hot water bath for 10 minutes.
Remove from water bath and let cool on a folded towel for 8-12 hours.