Dorayaki are Japanese sweet red bean pancakes, but this custard filling offers a creamy, vanilla-scented alternative that pairs beautifully with the honeyed pancake exterior. It’s a simple stovetop custard thickened with cornstarch, so it holds its shape when sandwiched without being overly stiff. This recipe yields a smooth, rich filling that comes together in about 15 minutes of active work.
Ingredients
- 1 cup (240 ml) whole milk
- 1/2 cup (120 ml) heavy cream
- 1/3 cup (65 g) granulated sugar
- 3 large egg yolks (about 55 g total)
- 2 tbsp (16 g) cornstarch
- 1 tsp vanilla extract
- 1 tbsp (14 g) unsalted butter, softened
- Pinch of salt
Instructions
- In a medium saucepan, combine the milk, heavy cream, and half of the sugar (about 2 1/2 tbsp / 30 g). Heat over medium heat, stirring occasionally, until steaming and small bubbles appear around the edges. Do not let it boil.
- In a separate bowl, whisk the egg yolks with the remaining sugar until pale and slightly thickened, about 1 minute. Add the cornstarch and salt, and whisk until smooth and no lumps remain.
- Slowly pour about 1/3 of the hot milk mixture into the yolk mixture while whisking constantly. This tempers the yolks so they don’t scramble. Then pour the yolk mixture back into the saucepan with the remaining hot milk, whisking all the while.
- Return the saucepan to medium-low heat. Cook, stirring constantly with a whisk or spatula, until the mixture thickens to a pudding-like consistency. This will take 3 to 5 minutes. You’ll see it start to bubble gently; continue stirring for 1 more minute after it thickens to cook out the cornstarch.
- Remove from heat and stir in the vanilla extract and softened butter until fully melted and smooth.
- Transfer the custard to a shallow bowl or baking dish. Press a piece of plastic wrap directly onto the surface to prevent a skin from forming. Refrigerate until completely chilled, at least 2 hours, before using. The custard will continue to set as it cools.
Tips
- Stir constantly: Custard can scorch or curdle if you stop stirring even for a few seconds. Use a flat-bottomed spatula to reach the bottom and corners of the pan.
- If it gets lumpy: If the custard looks curdled or lumpy, don’t panic. Immediately pour it through a fine-mesh sieve into a clean bowl. This will remove any cooked egg bits and give you a silky texture.
- Substitutions: You can use all milk instead of cream for a lighter filling, but it will be less rich. For a dairy-free version, use full-fat oat milk or coconut milk (from a can, not the beverage carton) and replace the butter with coconut oil. The flavor will change slightly.
- Don’t over-thicken: The custard will seem too thin at first, but it firms up considerably in the fridge. If you cook it until it’s very stiff on the stove, it will become rubbery when chilled.
Serving Suggestions
Use this custard as a filling for homemade dorayaki pancakes. Spread about 1 1/2 tablespoons of chilled custard on the non-browned side of one pancake, then sandwich with another. For a twist, add a thin layer of sweet red bean paste (anko) next to the custard. You can also serve the custard as a dip for fresh strawberries, or layer it with sponge cake and fruit for a quick trifle.
Variations
- Matcha: Whisk 1 tsp matcha powder into the cornstarch before adding the milk. This gives a pleasant earthy bitterness that cuts the sweetness.
- Chocolate: Add 2 oz (55 g) chopped dark chocolate to the hot custard after removing from heat, and stir until melted.
- Citrus: Add 1 tsp finely grated orange or lemon zest along with the vanilla. This brightens the flavor.
- Coffee: Replace 2 tbsp of the milk with strong brewed espresso, or add 1 tsp instant coffee powder to the milk before heating.
Storage and Reheating
Store the custard in an airtight container in the refrigerator for up to 3 days. Because it contains eggs and dairy, do not leave it at room temperature for more than 2 hours. To serve later, you can spoon it directly from the fridge—it will be firm but spreadable. If you prefer a softer texture, let it sit at room temperature for 10 minutes. Do not microwave the custard to reheat, as it will thin out and lose its structure. If you must warm it, do so gently in a saucepan over low heat, stirring constantly, but note that the texture will be less stable.
Frequently Asked Questions
Can I use this custard in a cake roll? Yes, but it’s quite soft. For a roll cake, whip 1/2 cup (120 ml) of heavy cream to stiff peaks and fold it into the chilled custard to lighten it. This will make it easier to spread without tearing the cake.
Why is my custard runny? The most common reason is not cooking it long enough. The cornstarch needs to reach a full simmer to activate. Also, make sure you measure the cornstarch correctly—using a dry measuring cup and leveling it off. If you used a liquid measuring cup, you might have added too little.
Can I make this ahead of time? Absolutely. In fact, it’s better to make it a day in advance so it has plenty of time to set. Just keep it covered in the fridge.
Can I freeze the custard? Yes, but the texture will change. Freeze in an airtight container for up to 1 month. Thaw in the refrigerator overnight, then whisk vigorously to smooth it out. It may be slightly less creamy, so it’s best used as a filling rather than a standalone dessert.
Is it safe to eat raw egg yolks in this recipe? The yolks are cooked through the heating process, so the custard is safe to eat. The mixture reaches at least 160°F (71°C) during cooking, which is the USDA FSIS safe minimum for egg dishes. If you’re concerned, use pasteurized egg yolks.
Can I use cornflour instead of cornstarch? Yes, cornflour is the same as cornstarch in the UK and many other countries. In the US, cornflour refers to cornmeal, so check your label.
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Safety notes: safe minimum internal temperatures from USDA FSIS; raw and undercooked fish guidance from the U.S. FDA. Food safety notes
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