A refrigerator appliance is provided and may include a cabinet, a door, a sealed cooling system, an ice crusher motor, and a frozen beverage unit. The cabinet may define a chilled chamber. The door may be attached to the cabinet to selectively restrict access to the chilled chamber. The door may include a door liner defining an icebox compartment. The sealed cooling system may be in fluid communication with the icebox compartment to circulate air within the refrigerator appliance. The ice crusher motor may be mounted within the icebox compartment. The frozen beverage unit may include a freezing tank and a rotatable auger. The rotatable auger may extend into the freezing tank and in operable attachment with the ice crusher motor.