The expansion of the plant will increase output by 25%, according to local media reports, after a press conference at the plant.
Samuel Garcia, the Nuevo Leon state governor, said the investment will also generate 300 new jobs in addition to the 2,500 already employed at the plant, which produces various Chocolate and candy products for the brand.
"With this investment, we are likely to go from fourth place to third among Hershey's largest plants," he said.