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Tom Yeung here with your Sunday Digest.
For centuries, Swiss cheesemakers considered the famous holes in their products as manufacturing defects. Bubbles were unsightly, made blocks hard to cut, and sometimes even caused cheese wheels to crack or explode.
We now know these holes are caused by microscopic hay particles in the cheesemaking process, and customers have come to expect them in their Swiss cheese. In fact, many makers now add powder to the cheese milk to create more holes.
