Here's a breakdown of the characters:
* 伯爵 (bóu jué): Earl
* 茶 (chá): Tea
You may also see it written as 格雷伯爵茶 (gé lěi bóu jué chá), which is "Grey Earl tea."
No matter how it's written, the pronunciation will remain the same: bóu jué chá or gé lěi bóu jué chá.