Muscle Nation Custard Protein Bar Muscle Nation Custard Protein Bar is a mouth-watering protein bar featuring a smooth Custard layer. It’s the ultimate protein-packed snack made with Muscle Nation's Custard Protein. With its unique soft Custard-filled centre and amazing flavours, these never get old. Features 15.7g of Protein Chocolate coating Custard filled centre Wide variety of flavours Our Thoughts Muscle Nation always nails its flavours and the Custard Protein Bar is no exception, each layer of the Custard Protein Bar provides a different texture so you get a cakey, creamy, crunchy bite all in one. These are perfect to have on hand for an on-the-go snack!