This recipe for making your own Ricotta Cheese by Chef Reed Hearon uses only whole milk, lemon juice and salt.
Line a colander with three layers of cheesecloth. Pour the mixture into the colander. Bring the ends of the cheesecloth together and tie them securely with kitchen twine. Tie the twine to a wooden spoon handle. Rest the spoon with the cheesecloth over a deep bowl. Depending on the consistency you desire, allow the bag to hang for 2 to 3 hours in the refrigerator. The longer you leave it, the stiffer the curds will become.
When it is ready, unmold the cheese. Season with salt and store in an airtight container in the refrigerator for 3 days. You might also season the ricotta with minced chives or green garlic, cracked black pepper, and a little olive oil.