Reddit mentions of Corn Sugar- 4 lbs.

Can't be all the corn sugar they put in literally everything. Here, you can buy it straight from the source. Or if you prefer liquids.

Okay, here's what you do.

Get a six-gallon, food-safe plastic bucket, with a lid with a small (like, quarter-inch) circular hole in it. You'll also need an s-shape airlock to put in the little hole. Get five gallons of apple juice from the grocery store, and a packet of wine yeast.

Clean the bucket with a 1% bleach solution (...the other 99% water) and rinse thoroughly. Add apple juice and yeast to the bucket, seal with the lid and airlock. Wait three to four weeks.

During this time, also get 48 empty beer bottles (you can use your own empties if you drink enough), and enough beer bottle caps. You'll also want a capper -- there are cheaper and harder-to-use options.

After the three to four weeks of fermentation, open the bucket and add about half a cup of sugar (corn sugar works best), and stir it in. Fill the bottles using either the spout on the bucket or a siphon hose, leaving a half- to three-quarters-inch of air at the top of each bottle.

Let the bottles sit a couple weeks to condition (carbonate), then refrigerate and enjoy. The dryness of the resulting cider will be based on which yeast you chose, so if you want a sweet cider use a white wine yeast, and if you want ultra-dry cider, use champagne yeast.