Castar sauce can be used in baking surface decoration, sandwich stuffing, bread cakes, puffs, doughnuts and other baking products. Castar sauce can be seen everywhere, with a faint color and a faint taste. It never usurps the host's role and will only add icing on the cake.

From the initial milk flavor and butter flavor, Castar sauce gradually developed into new flavors such as chocolate flavor, durian flavor, avocado flavor and salted egg yolk flavor, and its color also expanded from light yellow to brown and light green. Among them, Jianke acidic custard sauce: blue-purple blueberry custard sauce, golden attractive mango custard sauce and tender strawberry custard sauce, which combines real pulp with smooth custard sauce, has a sweet and sour taste and rich and attractive colors, and is of great significance for prolonging the shelf life and developing into long-term custard sauce.