Castella Cake (Kasutera) is a classic Japanese sponge cake known for its light, fluffy texture and delicate honey flavor. Made with just a handful of simple ingredients, this elegant cake is perfect for tea time, dessert, or any special occasion.
Its soft crumb and subtle sweetness make it a favorite among home bakers, and with the right technique, it’s surprisingly easy to make at home.
Why You’ll Love This Recipe
- Soft, fluffy, and moist texture
- Made with only a few simple ingredients
- Delicate honey flavor
- Perfect with tea or coffee
- Great for celebrations or everyday baking
Ingredients
- 6 medium eggs (room temperature)
- 1 cup (200g) granulated sugar
- 3 tablespoons (60g) honey
- 1 tablespoon warm milk
- 1 cup (120g) cake flour
Instructions
Step 1: Prepare the Pan
- Preheat the oven to 325°F (165°C).
- Line a 9×5-inch loaf pan with parchment paper, allowing the paper to extend above the sides.
Step 2: Whip the Eggs
In a large mixing bowl, beat the eggs and sugar for 8–10 minutes until the mixture becomes pale, thick, and triples in volume.
Step 3: Add the Honey
Mix the honey with the warm milk until smooth. Gently fold it into the whipped egg mixture.
Step 4: Fold in the Flour
Sift the cake flour into the batter in several additions, folding gently after each addition. Avoid overmixing to keep the batter light and airy.
Step 5: Fill the Pan
Pour the batter into the prepared loaf pan and gently tap it on the counter to release any large air bubbles.
Step 6: Bake
Bake for 45–50 minutes, or until the top is deep golden brown and a toothpick inserted into the center comes out clean.
Step 7: Cool
Let the cake cool in the pan for about 10 minutes, then transfer it to a wire rack to cool completely before slicing.
Tips for the Perfect Castella Cake
- Use room-temperature eggs for maximum volume.
- Whip the eggs until they reach a thick ribbon stage.
- Sift the flour to create a smoother batter.
- Fold gently to preserve the air in the mixture.
- Do not open the oven during the first 30 minutes of baking.
- Allow the cake to cool completely before slicing for the best texture.
Variations
- Add a teaspoon of matcha powder for a Japanese green tea version.
- Mix in a little lemon or orange zest for a refreshing citrus flavor.
- Add a layer of sweet red bean paste before baking for a traditional Japanese twist.
Storage
- Store in an airtight container at room temperature for up to 3 days.
- Refrigerate for up to 1 week.
- Freeze for up to 2 months. Thaw at room temperature before serving.
Serving Suggestions
Enjoy Castella Cake:
- With hot green tea
- Alongside coffee
- With fresh berries
- Topped with whipped cream
- Drizzled lightly with honey
Frequently Asked Questions
Can I make Castella Cake without honey?
Yes. You can substitute honey with golden syrup or agave syrup. The texture will remain soft, although the flavor will be slightly different.
How do I know when it’s fully baked?
Insert a toothpick into the center. If it comes out clean and the cake springs back when lightly pressed, it’s ready.
What makes Castella Cake different from regular sponge cake?
Castella Cake contains no baking powder or baking soda. Its light texture comes entirely from well-whipped eggs, while honey adds moisture and a distinctive flavor.
Can I make it gluten-free?
Yes. Replace the cake flour with a gluten-free baking flour blend that contains xanthan gum for the best texture.
Can I reduce the sugar?
Yes. You can reduce the sugar slightly, but keep in mind that sugar contributes to the cake’s structure, moisture, and tenderness.
Final Thoughts
Castella Cake is a timeless Japanese dessert that showcases how a few simple ingredients can create something truly special. With its soft, airy texture and delicate honey flavor, it’s perfect for afternoon tea, family gatherings, or whenever you’re craving a light homemade treat. Follow these steps and tips to enjoy a beautifully baked Castella Cake every time.