Abstract: A coffee brewer having a cup-shaped reservoir sized to hold a quantity of water sufficient to fill a cup of desired size. The coffee brewer also includes a coffee receptacle having a size to receive a charge of ground coffee sufficient to make one cup of brewed coffee of maximum desired strength. The reservoir and receptacle are shaped to telescopically receive one another in a snug-like engagement to securely and releasably attach the reservoir to the receptacle. The reservoir is provided with a plurality of apertures which permit the flow of heated water from the reservoir into the receptacle, while the receptacle is provided with a plurality of slits that permit the flow of brewed coffee from the receptacle into the cup in time relation to the flow of heated water from the reservoir into the receptacle. The receptacle includes an integral, radially extending flange that supports the coffee brewer on the upper edges of the cup.