Cadbury chocolate. The amount of milk being used in the Cadbury chocolate plant in Rathmore, Co Kerry, increased by more than a third (+34%) last year to 86m litres of milk, thanks to soaring chocolate sales. The company said it has invested €12m in recent years to expand capacity at its Rathmore plant, allowing it to take more milk from Irish dairy farmers. One of the standout consumer trends since COVID-19 hit 12 months ago has been an increase in chocolate sales, particularly over recent months. The Cadbury Dairy Milk chocolate bar is the market leader in both Ireland and the UK