Custard powder is the “secret weapon” in a chef’s pantry. Originally a staple of Western desserts like puddings and pastries, it was famously adapted by Hong Kong chefs to revolutionize Chinese cooking. Today, it is prized for its ability to create soft, fragrant, and “slippery” textures in both hot and cold dishes.
However, using custard powder is an art. If used incorrectly, its strong aroma can overpower your ingredients. Here is everything you need to know about using it effectively.
Types of Custard Powder
Before you start cooking, it is important to choose the right variety for your recipe:
- Instant Custard Powder: Dissolves directly in cold water. Perfect for quick fillings, cake decorations, and “ready-to-eat” toppings.
- Traditional Custard Powder: Requires heating to 60–70°C (the gelatinization point of starch) to thicken. It must be cooled before it reaches its final consistency.
- Specialty Powders: Often tailored for specific uses like cheesecakes or fruit pies to provide a particular “slippery” mouthfeel.
Culinary Best Practices: Dos and Don’ts
1. Don’t Mask Your Main Ingredients
Custard powder has a powerful milky and fruity scent. While this is great for bread and tarts, it can be a disadvantage for delicate proteins.
- Avoid using it when the goal is to keep the “original flavor” of fresh seafood (fish, shrimp, or crab).
- The Risk: Adding too much to seafood or crispy meats can make the flavor profile “nondescript” or confusing.
2. The Perfect Pairing
Custard powder excels in dishes with bold, acidic, or sweet profiles, such as:
- Hong Kong-style Sweet and Sour Sauce
- Lemon or Fruit Juice Glazes
- Garlic Ribs (where a higher amount helps balance the savory garlic)
Precise Ratios for Perfect Results
To ensure your dishes maintain their characteristics while benefiting from the color and aroma of custard powder, follow these professional measurement guidelines:
| Application | Recommended Ratio (per 500g of raw material) |
| Fruit & Sweet/Sour Sauces | 5 grams |
| Garlic Ribs | 15 grams |
| Thickening/Binding | 2–5 grams (mixed with water starch) |
| Crispy Batter/Paste | 15% of the total paste volume |
Common Applications in Baking and Cooking
Because custard powder is highly soluble and fragrant, it is the ideal addition to:
- Pastries: Egg tarts, egg rolls, and bread fillings.
- Desserts: Puddings, fruit pies, and custard-based sandwiches.
- Savory Dishes: Thickening sauces to add a glossy, transparent finish and a hint of sweetness.
Pro Tip: Thickening with Custard Powder
When using custard powder as a thickener, always mix it with a little water starch first. This ensures a smooth, lump-free sauce with superior transparency and a professional sheen.
Can custard powder be used as a substitute for cornstarch in general cooking?
Yes, because the primary ingredient in custard powder is cornstarch, it can be used as a direct substitute for thickening sauces, gravies, or fillings. However, there are two important factors to keep in mind:
Thickening Power: It provides a similar thickening strength to cornstarch, so you can typically use a 1:1 ratio when substituting.
Flavor and Color: Unlike plain cornstarch, custard powder contains vanilla flavoring and yellow coloring. This makes it ideal for sweet dishes or yellow-based sauces but unsuitable for savory recipes where a vanilla aroma or yellow tint would be undesirable.
What is the difference between “pouring custard” and “set custard” when using the powder?
The difference lies entirely in the ratio of powder to liquid used during the cooking process:
- Pouring Custard (Creme Anglaise style): Created using a lower concentration of powder. It results in a silky, fluid sauce that is perfect for drizzling over warm fruit crumbles, puddings, or cakes.
- Set Custard: Created by increasing the amount of custard powder relative to the milk. Once cooked and cooled, this version firms up significantly, allowing it to be used as a stable filling for trifle layers, fruit tarts, or sliced as a standalone dessert.
Adjusting the measurements allows you to customize the thickness based on the specific requirements of your recipe.
