Stock-in-a-box. All natural. For more recipes, visit rachaelray.com. Whether you're making a chicken & chick pea one pot or this quick and easy Chicken with Mustard Maple Gravy recipe, be sure to use Stock-in-a-Box for flavor that rocks! - Rachael Ray. No MSG. Gluten-free. Tetra Pak: Protects what's good. Tetra Brik Aseptic.