J.M. Smucker's (SJM) Folgers, Dunkin' Donuts and Millstone Brands of Coffee On May 24 J.M. Smucker raised coffee prices for the fourth time this year in response to soaring Arabica costs, and this latest price hike is the largest yet at 11%. J.M. Smucker implemented the price increase on its Folgers, Dunkin' Donuts and Millstone brands of coffee. J.M. Smucker has raised prices by 34% over the past year as it struggled to maintain margins amid soaring coffee costs. J.M. Smucker said that green coffee costs were "significantly higher in the second quarter of 2011." Smucker raised prices on its Folgers and other well-known brands by around 9% earlier this year.