To a pot, add cider vinegar, white sugar, sugar alternitize, mustard seeds, turmeric, and celery seed and bring to a boil. Reduce heat to about MED LOW and simmer for 5 minutes.
Remove and discard stems from peppers, then slice into 1/4" slices. Set pepper slices aside.
Raise the heat to about MED HIGH to bring mixture back to a boil. Once boiling, add the pepper slices. Allow to return to a boil, then reduce the heat again (to about MED LOW) and simmer for 4 minutes.
Transfer the peppers using a slotted spoon to clean glass canning jars, filling jars to within 1/4 inch of the upper rim of the jar.
Ladle the syrup into the jars with the jalapeno slices. If you notice any air pockets, take a clean spoon and insert it into the jar to get rid of the trapped air. Fill jars to within 1/4-1/2" from the upper rim of the jar.
Wipe the rims of the jars with a damp paper towel, let come to room temputure and then screw on canning jar lids. Label if desired and refrigerate for at least 1-2 weeks (3-4 weeks for optimal flavor). Candied jalapenos are good for up to 3 6onths if kept properly refrigerated.
Canning Instrutions
After filling the jars with candied jalapeños and syrup (leaving ½ inch to ¼” of head space), remove air bubbles from the packed jars with a canning bubble tool, chopstick, or clean butter knife.Wipe the rim of the jars with a damp paper towel or clean cloth. A clean rim is essential for a good seal!Place fresh canning lids centered on the jars, and then add jar rings. Lightly tighten the jar rings to fingertip-tight.Using a jar lifter or canning tongs, carefully transfer the jars of candied jalapeños into a ready and boiling hot bath canner. The jars should be covered by at least 1 to 2 inches of water, and be resting on a canning rack (not directly on the bottom of the pot)Return to a boil, and then process cowboy candy for 10 minutes for half pints or 15 minutes for pints.