Bay Area McDonald's testing Crab Sandwich FOX 26 Houston News Published February 9, 2017 4:31 PM CST Share Copy Link Email Facebook Twitter LinkedIn Reddit Published February 9, 2017 4:31 PM CST article SAN JOSE, Calif (KTVU) - According to McDonald’s website, the crab sandwich has 410 calories, 24 grams of fat and 14 grams of protein.