It happened around 10:30 a.m. at the store located in the 200 block of White Horse Pike.
Police say the Winslow Township officer was not responding to call when he collided with another vehicle then went into the store.
The officer sustained minor injuries in the collision.
The other driver was not injured and refused medical treatment.
The Dunkin Donuts does have structural damage.
No one inside the store was injured.