Milk - Contains not less than 3.25 percent milk fat and 8.25 percent solids-not-fat. Addition of vitamins A and D is optional, but if added, vitamin A must be present at a level of not less than 2,000 International Units (I.U.) Per quart; vitamin D is optional, but must be present at a level of 400 I.U., if added. Characterizing flavoring ingredients may also be added.