It is. Fat and sugar are not the same thing. Hot pockets contain about 25 grams of fat and 10 grams of sugar. Depending on the product. The label does not indicate any HFCS but the effect described above would be achieved with any sugar and most sugar substitutes.

The majority of calories from hot pockets are from empty carbs, and that is what's causing you to feel hungry after eating them. 72g of carbs to 43g of combined fat and protein, and only 2g of fiber.