Add apple scraps/whole apple pieces to a mason jar, filling it 3/4 of the way full. Leave space for the liquid to enter between the pieces.
Mix 1 cup of water with the sugar until it dissolves. Add that to your jar. If you need more liquid, top up with water until apples are completely submerged.
Add a fermentation weight to the top of your jar to ensure apples stay submerged.
Cover the jar opening with a coffee filter and secure with a rubber band. Place in a cool, dark place.
Check your apple cider vinegar daily. I switch out the fermentation weight every few days. Using a wooden spoon or silicone spatula, move the apples around.
After 2 weeks, strain the apple scraps through a cheesecloth or coffee filter and a fine mesh strainer.
Put the strained apple cider vinegar into a new clean jar, cover the same way with a coffee filter and rubber band. Let sit in a cool, dark location for another 2 weeks.
During the 2 week wait, taste your ACV until it reaches the taste you desire.
Once the second fermentation is completed, strain the liquid again and store in a new, clean jar with a lid. Place in a cool, dark location and use within a 6-9 months. You can also store it in the refrigerator if you'd prefer.