Yellow Matter Custard is a Beatles tribute supergroup consisting of Mike Portnoy (Dream Theater, Transatlantic, OSI, Liquid Tension Experiment, Liquid Trio Experiment, Avenged Sevenfold, Adrenaline Mob), Neal Morse (Transatlantic, Spock's Beard), Paul Gilbert (Racer X, Mr. Big) and Matt Bissonette (Mustard Seeds, Jughead, The Squirts, Joe Satriani, Electric Light Orchestra). Kasim Sulton (Utopia and various Todd Rundgren bands) played bass with the band in 2011, replacing Bissonette.

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