Tillamook Thin Medium White Cheddar Cheese Slices are cut thick, creating big and bold flavor in every bite. This naturally aged white cheddar adds bold flavor to your burgers, sandwiches and cheese snacks. These white cheddar cheese slices are a crowd-pleaser. Tillamook Cheese uses high-quality milk from cows not treated with rBST*. *The FDA has stated that no significant difference has been shown between milk derived from rBST treated and non-rBST treated cows.