B & S Custard Crème Filling Mix is a powdered premix that creates a creamy, rich, and thick custard filling with a subtle vanilla flavor twist and balanced sweetness perfect for filling and toppings for bread, cakes, and pastries. Plus, all you need to add is water, mix, and you’ll have a custard filling in a matter of minutes. To even accentuate its flavor, cook the mixture for a few minutes, use it immediately, or store it for days in the chiller – it will still retain its delicious flavor when used.