Prepare Apple Scraps:Collect apple peels, cores, and leftover pieces. Remove any rotting parts. Place the apple scraps into a clean half gallon mason jar, filling it halfway.
Add Water and Sugar:Pour enough water into the jar to completely cover the apple scraps. For each cup of water, stir in 1 tablespoon of sugar (either brown sugar or white sugar). This helps feed the fermentation process. If you have some on hand, add a couple of tablespoons of raw apple cider vinegar to speed up fermentation.
Cover and Store:Cover the jar with a clean tea towel or butter muslin, and secure it with a jar ring or rubber band. Store the jar in a dark, warm spot (around 70°F), away from direct sunlight. Let the mixture ferment for 2-3 weeks, stirring daily.
Strain and Ferment Further:After 2-3 weeks, strain out the solids, keeping the liquid. Return the liquid to the jar and cover again. Let it ferment for another 3-4 weeks. Taste periodically to check the acidity level until it's to your liking.
Store and Enjoy:Once you’re happy with the flavor, pour your homemade apple cider vinegar into jars with tight-fitting lids and store it in a cool, dry place. The vinegar will continue to develop in flavor over time.