Bay Area McDonald's testing Crab Sandwich FOX 7 Austin News Published February 10, 2017 6:26 AM CST Share Copy Link Email Facebook Twitter LinkedIn Reddit Published February 10, 2017 6:26 AM 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.