South Mountain Creamery is expanding its footprint in suburban Baltimore to keep up with renewed demand for old-fashioned milk delivery services this past year. The Frederick County-based, family-owned dairy farm is based on 300 acres in Middleton, and just signed a lease to expand into a 5,400-square-foot distribution center in the Aberdeen Technology Park next month. There, its milk, butter, yogurt, eggs and ice cream will be routed to customers in the area that includes Baltimore, Harford and...