The jalapeño peppers in these singles add a hint of heat to burgers, sandwiches, paninis, and more. The Weight Watchers Reduced Fat Pepper Jack Singles are an excellent source of calcium and offer 1 gram of fiber in every slice. At only 45 calories, 2.5 grams of fat (1.5 saturated) and 4 grams of protein per slice, you can have that cheeseburger or dress up your sandwich in a healthy and tasty way.