Taiwan Castella Cake Recipe: Fluffy & Soft

Taiwanese castella cake is a beloved bakery treat known for its cloud-like softness, jiggly texture, and honey-kissed sweetness. This recipe achieves that signature tall, wobbly cake using a simple chiffon method with a water bath, yielding a moist crumb that practically melts in your mouth. It’s a showstopper dessert that’s surprisingly achievable at home with a little patience and precision.

Ingredients

6 large eggs, separated (about 200 g whites and 90 g yolks)
80 ml (1/3 cup) whole milk
60 ml (1/4 cup) vegetable oil (or melted butter, cooled)
80 g (1/2 cup + 2 tbsp) cake flour, sifted
1 tbsp honey
1/2 tsp vanilla extract
90 g (1/2 cup) granulated sugar
1/4 tsp salt
1/4 tsp cream of tartar (optional, for stability)

Instructions

Preheat your oven to 320°F (160°C). Line the bottom and sides of a 9×5-inch (23×13 cm) loaf pan with parchment paper. Set aside.
In a small saucepan, gently warm the milk and oil together over low heat until just warm to the touch (about 110°F/43°C). Do not boil. Remove from heat.
In a large bowl, whisk the egg yolks with the honey, vanilla, and salt until pale and slightly thickened. Slowly pour in the warm milk-oil mixture while whisking constantly.
Sift the cake flour into the yolk mixture and whisk until smooth and no lumps remain. Set aside.
In a clean, dry bowl of a stand mixer (or using a hand mixer), beat the egg whites with cream of tartar on medium speed until foamy. Gradually add the sugar, a tablespoon at a time, while continuing to beat. Increase speed to high and beat until stiff peaks form—the whites should be glossy and hold a firm peak when the whisk is lifted.
Gently fold one-third of the meringue into the yolk mixture using a rubber spatula to lighten it. Then, carefully fold in the remaining meringue in two additions, folding just until no streaks remain. Be gentle to keep the air in the batter.
Pour the batter into the prepared loaf pan. Tap the pan on the counter a few times to release any large air bubbles.
Place the loaf pan into a larger roasting pan. Pour hot (not boiling) water into the roasting pan until it reaches about halfway up the sides of the loaf pan.
Bake for 50-60 minutes, until the cake is golden brown and a skewer inserted into the center comes out clean. The top should feel springy to the touch. If the top browns too quickly, loosely cover with foil after 30 minutes.
Turn off the oven, crack the oven door, and let the cake cool in the water bath for 15 minutes. This gradual cooling helps prevent cracking.
Remove the loaf pan from the water bath and let it cool on a wire rack for 10 minutes. Then, carefully lift the cake out using the parchment paper and let it cool completely on the rack before slicing.

Tips

Use cake flour: Cake flour has lower protein content than all-purpose flour, which gives the cake its tender, fine crumb. If you don’t have cake flour, substitute with 80 g all-purpose flour minus 1 tablespoon, and add 1 tablespoon cornstarch.
Don’t overmix: When folding the meringue, use a light hand. Overmixing deflates the egg whites and results in a dense, flat cake.
Water bath is essential: The steam from the water bath keeps the oven humid, preventing the cake from drying out and helping it rise evenly. Don’t skip it.
Cool slowly: The 15-minute rest in the turned-off oven is crucial to prevent the cake from sinking or cracking due to sudden temperature change.

Serving Suggestions

Serve the castella cake at room temperature, cut into thick slices. It’s delicious on its own, but you can elevate it with a dusting of powdered sugar, a dollop of whipped cream, and fresh berries. For a Taiwanese-style treat, pair it with a cup of hot oolong tea or milk tea.

Variations

Matcha Castella: Replace 1 tablespoon of cake flour with 1 tablespoon of matcha powder and sift together before adding to the batter.
Chocolate Castella: Replace 2 tablespoons of cake flour with 2 tablespoons of unsweetened cocoa powder.
Honey-Free: If you prefer not to use honey, substitute with an equal amount of maple syrup or golden syrup.
Lemon Castella: Add the zest of one lemon to the egg yolk mixture for a bright, citrusy flavor.

Storage and Reheating

Store the castella cake in an airtight container at room temperature for up to 2 days. For longer storage, wrap it tightly in plastic wrap and refrigerate for up to 5 days. To serve cold, let it sit at room temperature for 20 minutes. To reheat, microwave a slice for 10-15 seconds until just warm, or toast it lightly in a toaster oven for a crisp exterior.

Frequently Asked Questions

Why did my cake collapse in the middle? This is usually caused by underbaking or opening the oven door too early. Make sure the cake is fully set and a skewer comes out clean. Also, always cool it gradually in the oven as directed.

Can I use a different pan size? Yes, you can use an 8×8-inch square pan or a round 8-inch cake pan, but adjust the baking time. A wider pan will produce a shorter cake that bakes faster; start checking at 40 minutes.

Why is my cake rubbery? Overmixing the batter after adding the flour or overbeating the egg whites can cause a rubbery texture. Be gentle and stop mixing as soon as the ingredients are incorporated.

Can I make this cake without a water bath? You can, but the texture will be less moist and the cake may crack on top. The water bath is key to the authentic Taiwanese castella texture.

How do I know when the cake is done? The cake should be golden brown and the top should spring back when lightly pressed. A toothpick inserted into the center should come out clean, with no wet batter clinging to it.

Can I freeze castella cake? Yes, wrap the cooled cake tightly in plastic wrap and then foil. Freeze for up to 1 month. Thaw in the refrigerator overnight before serving.

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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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