A brewing unit (100) for a beverage producing device (900) is disclosed. The brewing unit (100) includes a main body (102) defining a cavity (200) for receiving multiple types/formats of capsules (120). Further, one or more piercing members (106) are also included in the brewing unit (100). Furthermore, the one or more piercing members (106) are actuated by an actuator (108) to pierce or not to pierce the capsule (120) when the brewing unit (100) is in at least one of corresponding piercing mode/non-piercing mode.