The Boston Business Journal reports that shares of Green Mountain Coffee Roasters Inc. (Nasdaq: GMCR) surged 15 percent Thursday morning after the company said sales at its Reading-based Keurig single-cup brewing business surged 89 percent in the fiscal first quarter.

The Vermont-based company’s stock rose 15 percent to $32.96 after backing a financial forecast that’s better than what some analysts expected.

“With sales growth driven by the strong sales of Keurig Single-Cup brewers and K-Cup portion packs during the holiday season, we are off to a very strong start for fiscal year 2011,” Green Mountain CEO Lawrence J. Blanford said in the earnings release.

Read more: Boston Business Journal