The group, whose brands also include Country Life butter and Frijj milkshake, reported a 5 per cent rise in underlying pre-tax profits to 40.1 million for the six months to 30 September.
It said higher profits in cheese - up 58 per cent to 12.5m - "more than offset" a lower performance in its dairies, which are battling against a highly competitive milk market.
Higher selling prices and efficiency savings also helped shore up results in the face of rising input costs, with profits increasing in spite of a 3 per cent fall in revenues.
Targeted advertising and promotions saw sales across its five key brands grow 5 per cent against a year earlier.
The best performers were Cathedral City and St Hubert Omega 3, which delivered increases of 10 per cent and 7 per cent respectively.
Sales of Country Life - recently boosted by a promotional drive including "Great British Butter" adverts featuring former Sex Pistol John Lydon - rose 2 per cent, but were held back by "significant" price hikes in the first quarter, it said.
Its dairies arm suffered a more difficult first half as profits dropped 24 per cent to 10.9m.
It is concentrating on major retail contracts to combat a declining and competitive middle-ground milk market, which covers smaller retailers, independents and food service companies.