“Ye are a chosen generation, a royal priesthood, an holy nation, a peculiar people; that ye should shew forth the praises of him who hath called you out of darkness into his marvelous light.” (I Peter 2:9)
“Each believer is a priest, both before God for oneself and by caring for fellow believers and for persons in the world for whom Christ died.” 

From We Baptists, James Leo Garrett Jr. (editor-in-chief)

To say that a Baptist is a priest sounds strange to some persons. But we are. Every one of us. In fact, Baptists insist that all who believe in Jesus as Lord and Savior are priests, believer priests. The concept of the priesthood of believers is basic for Baptists. As with some other beliefs important to Baptists, we have varying interpretations of what the concept means, but we all treasure the biblical truth of the priesthood of believers.