The healthiest burgers on the Whataburger menu are Double Meat Whataburger Jr., Avocado Bacon Burger, and Garden Salad with Grilled Chicken. The Double Meat Whataburger Jr. contains 420 calories, 20 g fat, 6 g saturated fat, 37g carbohydrates, 23 g protein, and 870 mg sodium. Avocado Bacon...