Step 1

Combine the sugar, lemon juice, whey, and filtered water into a glass jar or jug. I used a gallon-sized jar.

Step 2

Stir thoroughly until the sugar is mostly dissolved.

Step 3

Seal the jar with a tight lid and keep it at room temperature for 72 hours. You can keep it on your counter or a pantry shelf - whatever works!

Step 4

You may want to release the pressure on your jar each day by loosening the lid briefly.

Step 5

After 72 hours, the lemonade should be bubbly. The longer it ferments, the more carbonated it will be.

Step 6

Store your lemonade in a sealed container in the refrigerator. Serve cold from the fridge or over ice and enjoy!