Castella Cake: Fluffy Japanese Honey Sponge Cake 🍯🍰

This jiggly, golden-brown Castella cake is a light, subtly sweet Japanese sponge cake made with just 4 simple ingredients. Originating from Nagasaki, it’s known for its moist, bouncy texture and delicate honey flavor. Perfect with tea or as an elegant dessert!


Why You’ll Love This Recipe

âś… Only 4 ingredients (eggs, sugar, flour, honey)
âś… Naturally light & fluffy (no butter or oil!)
âś… Slightly chewy, moist crumb from its unique baking method


🥚 Ingredients

(Makes 1 loaf, 8–10 slices)

  • 6 large eggs, room temperature
  • 1 cup (200g) granulated sugar
  • 1 cup (120g) bread flour (or cake flour for softer texture)
  • 2 tbsp honey + 2 tbsp warm water (mixed)
  • 1 tbsp neutral oil (for greasing pan)

👩‍🍳 Step-by-Step Instructions

1. Prep the Pan

  • Line a 9×5-inch loaf pan with parchment paper, leaving overhang on the sides. Lightly grease with oil.

2. Whip Eggs & Sugar

  • In a large bowl, beat eggs and sugar with a mixer on high speed for 8–10 mins until pale, thick, and ribbon-like (when you lift the whisk, the batter should fall slowly and leave a trail).

3. Fold in Flour

  • Sift flour into the egg mixture in 3 batches, gently folding with a spatula after each addition (don’t overmix!).

4. Add Honey Syrup

  • Drizzle in honey-water mixture, folding gently until just combined.

5. Bake Low & Slow

  • Pour batter into the pan. Drop the pan lightly on the counter 2–3 times to remove air bubbles.
  • Bake at 320°F (160°C) for 50–60 mins until golden and a toothpick comes out clean.
  • Optional: After 15 mins of baking, quickly score the top with a knife for a flat surface.

6. Cool & Wrap

  • Immediately after baking, cover with plastic wrap (to retain moisture) and cool upside-down on a rack for 1 hour.
  • Slice with a serrated knife the next day for clean cuts.

đź’ˇ Pro Tips

🔥 Room-temp eggs whip better for maximum fluffiness.
🔥 Bread flour gives structure; cake flour makes it softer.
🔥 For extra moisture, brush the top with more honey syrup after baking.


âť“ FAQs

Why did my cake sink?

  • Overmixed batter or underbaking. Ensure the toothpick test is clean!

Can I reduce the sugar?

Yes, but the texture may be denser (sugar helps stabilize the eggs).

How to store?

  • Room temp (wrapped): 2 days
  • Fridge: 1 week (microwave 10 secs to soften)
  • Freeze: 1 month

Final Thoughts

This Castella cake is a delicate, honey-kissed masterpiece—simple yet impressive. Serve with matcha tea or fresh fruit for a true Japanese treat!

Love Asian desserts? Try these next:

  • Japanese Cheesecake (Cotton Soft)
  • Mochi Donuts
  • Taiyaki (Fish-Shaped Pancakes)

Made it? Tag us with your jiggly cake slice! đź“¸đź’›

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