Researchers have found evidence of cheesemaking in the Swiss Alps [york.ac.uk] dating back to the 1st millennium BC:
An international team led by the University of York and Newcastle University looked at the composition of residues left on fragments of ceramic pots found at six sites in the Swiss Alps. The shards of pottery were known to date from Neolithic times to the Iron Age. The researchers found that the residue on those from the 1st millennium BC - the Iron Age - had the same chemical signatures associated with heating milk from animals such as cows, sheep and goats, as part of the cheesemaking process.
The ceramic fragments examined as part of this study were found in the ruins of stone buildings similar to those used by modern alpine dairy managers for cheese production during the summer months.
Although there is earlier evidence for cheese production in lowland settings, until now virtually nothing was known about the origins of cheesemaking at altitude due to the poor preservation of archaeological sites.
Also at Futurity [futurity.org]. Mirrored at Newcastle University [alphagalileo.org].
Chemical Analysis of Pottery Demonstrates Prehistoric Origin for High-Altitude Alpine Dairying [plos.org] (open, DOI: 10.1371/journal.pone.0151442)