🍯 Japanese Castella Cake
Light, airy, and delicately sweet, Japanese Castella Cake is a traditional sponge cake with a fine, moist crumb and a soft, bouncy texture. Originally introduced to Japan by Portuguese merchants, this beloved cake is made with simple ingredients—eggs, sugar, flour, and honey—creating an elegant dessert that’s perfect with tea or coffee. Resting the cake overnight enhances its signature moist texture and rich flavor.
🕒 Recipe Information
Prep Time: 20 minutes
Bake Time: 50–60 minutes
Cooling & Resting Time: Overnight (recommended)
Total Time: About 1 hour 20 minutes, plus overnight resting
Servings: 12 slices
Difficulty: Intermediate
📝 Ingredients
For the Castella Cake
- 6 large eggs, room temperature
- 1 cup (200g) granulated sugar
- 1 cup (130g) bread flour, sifted
- 3 tbsp honey
- 2 tbsp warm whole milk
- 1 tsp vanilla extract (optional)
👩🍳 Instructions
Step 1: Prepare the Baking Pan
Preheat the oven to 320°F (160°C).
Line an 8×8-inch (20×20 cm) square baking pan with parchment paper, allowing the paper to extend above the sides of the pan for easy removal after baking.
Set the prepared pan aside.
Step 2: Prepare the Honey Mixture
In a small bowl, combine the honey and warm milk.
Stir until the honey is completely dissolved and smooth.
If using vanilla extract, stir it into the honey mixture.
Set aside.
Step 3: Beat the Eggs and Sugar
Place the room-temperature eggs and granulated sugar into a large mixing bowl.
Using an electric mixer on high speed, beat for 8–10 minutes, or until the mixture becomes very thick, pale, glossy, and triples in volume.
When the beaters are lifted, the batter should fall in thick ribbons that remain on the surface for several seconds before disappearing.
This step is essential for creating the cake’s signature light and fluffy texture.
Step 4: Fold in the Flour
Sift the bread flour once more over the egg mixture in several additions.
Using a large spatula, gently fold the flour into the batter with slow, sweeping motions.
Rotate the bowl as you fold, taking care not to deflate the air that has been incorporated into the eggs.
Continue folding only until no dry streaks of flour remain.
Step 5: Add the Honey Mixture
Pour the honey mixture around the edge of the bowl.
Fold gently until evenly incorporated, ensuring the batter remains light and airy.
Avoid overmixing.
Step 6: Fill the Pan
Pour the batter into the prepared baking pan.
Use a spatula to level the surface.
Gently tap the pan on the countertop two or three times to release any large air bubbles.
If small bubbles remain on the surface, pop them with a toothpick for a smoother finish.
Step 7: Bake
Bake for 50–60 minutes, or until the top is a rich golden brown and a toothpick inserted into the center comes out clean.
If the top begins to brown too quickly, loosely cover the cake with aluminum foil during the last 15 minutes of baking.
Step 8: Cool the Cake
Remove the cake from the oven.
Lift it carefully from the pan using the parchment paper and transfer it to a wire rack.
Allow the cake to cool completely.
Once cooled, wrap the entire cake tightly in plastic wrap.
For the authentic Castella texture, allow the wrapped cake to rest overnight at room temperature. This resting period helps the crumb become exceptionally moist, soft, and flavorful.
Step 9: Slice and Serve
Using a sharp serrated knife, trim the edges if desired for a traditional presentation.
Slice into thick rectangular pieces.
Serve with green tea, black tea, coffee, or fresh fruit.
💡 Baker’s Tips
- Use room-temperature eggs to achieve maximum volume when whipping.
- Bread flour gives Castella its characteristic chewy yet delicate texture.
- Sift the flour several times for the lightest crumb.
- Fold the batter gently to preserve the air incorporated during mixing.
- Wrapping the cake while it is completely cooled and allowing it to rest overnight greatly improves both texture and flavor.
- For perfectly clean slices, wipe the knife between each cut.
🍯 Variations
🍵 Matcha Castella
Replace 2 tablespoons of bread flour with matcha powder for a vibrant green tea flavor.
🍫 Chocolate Castella
Substitute 2 tablespoons of flour with unsweetened cocoa powder for a rich chocolate version.
🍋 Lemon Honey Castella
Add 1 tablespoon of fresh lemon zest to the batter for a bright citrus twist.
🟤 Brown Sugar Castella
Replace half of the granulated sugar with light brown sugar for a deeper caramel flavor and darker color.
📌 Storage
Room Temperature: Wrap tightly and store for up to 3 days.
Refrigerator: Store in an airtight container for up to 5 days.
Freezer: Wrap individual slices in plastic wrap and freeze for up to 2 months. Thaw at room temperature before serving.
📝 Recipe Notes
- Traditional Japanese Castella contains no butter or oil, relying on whipped eggs for its light texture.
- Honey gives the cake its signature sweetness, moisture, and delicate aroma.
- Resting the cake overnight is highly recommended for the soft, moist texture that makes Castella famous.
- This elegant sponge cake is perfect for afternoon tea, holidays, special occasions, or as a light dessert after dinner.