4 Ingredients! Japanese Castella Cake

5 from 8 votes
Leave a Review!
50 minutes
Servings 14 slices
JUMP TO RECIPE & VIDEO

Make this authentic Japanese Castella Cake at home! It’s simple, fluffy, and perfect to enjoy with your favorite tea or coffee.

Looking for easy recipes? Try my Rice Flour Pancake, Banana Cake, or Tofu Donuts Recipe!

2 slices of Japanese castella cake on a dessert plate

Why You Will Love This Recipe 

  • Easy to make with only 4 ingredients!
  • Simple one-bowl cake recipe. Just mix and bake.
  • Light, fluffy, and perfect for an everyday treat.

Castella

Castella is a popular traditional Japanese sponge cake known for its moist and fluffy texture, rectangular shape, and beautiful brown top. It is made with simple ingredients such as eggs, sugar, flour, and honey. The batter is beaten for a long time to create a fluffy texture, then baked slowly.

Recipe Ingredients

You’ll need the following ingredients to make this Castella Cake:

Save the Recipe via Email (Recipe Posts)

Save This Recipe!

Enter your email and I’ll send this recipe straight to your inbox! You’ll also get new, simple recipes every week!

Castella cake ingredients.
  • Flour: You can use all-purpose, cake, or rice flour (for a gluten-free option). Cake flour gives the softest and finest texture, which is why I use it in this recipe.
  • Sugar: Any type of sugar works well. For a deeper and richer flavor, try kurozato (Japanese black sugar).
  • Honey: The key ingredient that gives Castella its soft, moist texture, along with an elegant aroma.

How To Make Castella Cake: STEP BY STEP 

Here’s a quick visual guide! Check the recipe card below for the video and full details!

How to make castella cake.

Step 1

Whip eggs and sugar with a hand mixer until thick and creamy.

How to make castella cake.

Step 2

Add honey and water, then mix to combine.

How to make castella cake.

Step 3

Add the flour and stir gently until smooth.

How to make castella cake.

Step 4

Pour the batter into the pan and bake at 180°C for 15 minutes.

How to make castella cake.

Step 5

Cover the cake with aluminum foil and continue baking at 160°C for 25 minutes.

How to make castella cake.

Step 6

Let the cake cool briefly, wrap it in plastic, and let it rest before slicing.

2 slices of Japanese castella cake on a dessert plate

Your Castella is ready! Cut yourself a slice and enjoy the fluffy texture and sweet aroma. Hope you love every bite!

Recipe Tips

  • Bring eggs to room temperature: Room-temperature eggs mix more easily with other ingredients, helping the batter blend smoothly and rise evenly.
  • Let it rest for the best texture: You can enjoy the cake right away, but letting it rest for about half a day makes it even more moist and flavorful.
  • For an extra-fluffy texture: If you prefer a chiffon-like softness, separate the egg whites and yolks and beat them separately before combining.
  • Pan options: You can use a loaf pan, a square pan, or any similar-sized oven dish. If your pan size differs, adjust the baking time as needed.

Storage

many slices of Japanese castella cake in a container

Slice the cake and store the pieces in an airtight container in the refrigerator for 3 to 4 days.

You can also freeze them for longer storage. Wrap each slice tightly in plastic wrap and freeze for up to 1 month. When ready to enjoy, warm a slice gently in the microwave. It’ll be just as soft and fluffy as freshly baked!

Variations

These variations are so delicious and will bring fun, unique flavors to your Castella cake!

a slice of matcha castella on a plate with a folk
  • Matcha Castella: Add 2 tsp matcha powder (green tea)
  • Chocolate Castella: Add 1 Tbsp Cacao powder
  • Strawberry Castella: Add 1 Tbsp strawberry puree
  • Sweet Potato Castella: Add 1 Tbsp Japanese sweet potato puree

You can also add a little vanilla extract for extra flavor.

Vegetarian ebook cover image.

Want more Japanese Plant-Based Ideas?

Get 10 Easy
Vegetarian recipes

2 slices of Japanese castella cake on a cutting board

More Dessert Recipes You Will Love

Leave a Rating!

I hope you enjoy this Castella Cake! If you try it, don’t forget to leave a rating to share your thoughts—I love hearing from you!

4 Ingredients! Japanese Castella Cake

5 from 8 votes
Prep: 10 minutes
Cook: 40 minutes
Total: 50 minutes
Servings: 14 slices
Author: Juri Austin
Make this authentic Japanese Castella Cake at home! It’s simple, fluffy, and perfect to enjoy with your favorite tea or coffee.
切り分けられたカステラ

Equipment

  • Cake pan 15×15 cm (6×6 inches), or loaf pan
  • Hand mixer, or stand mixer

Ingredients
  

  • 3 Eggs
  • 5 Tbsp Sugar, 70g
  • Tbsp Honey, 30g
  • 2 Tbsp Water, 30g
  • ½ cup + 2 Tbsp Flour, 100g

Instructions
 

  1. Preparation: Preheat the oven to 180°C (356°F). Line a square cake pan with parchment paper.
  2. Whip Eggs: In a large bowl, combine the eggs and sugar. Place the bowl over a tray of hot water (or use a double boiler) and whip with a hand mixer on high speed for 3–4 minutes until the mixture becomes thick.
  3. Make the Batter: In a small bowl, mix honey and water. Add this to the egg mixture and whisk on low speed until combined. Sift the flour over the mixture and gently fold it in with a spatula until just incorporated.
  4. Bake: Pour the batter into the prepared cake pan. Tap the pan lightly on the counter to remove air bubbles. Bake at 180°C (356°F) for 15 minutes, then cover with aluminum foil and continue baking at 160°C (320°F) for 25 minutes.
  5. Wrap & Rest: Let the cake cool slightly, then remove the parchment paper. Wrap the cake tightly in plastic wrap, turn it upside down, and let it rest for a few hours before slicing.
  6. Serve: Remove the wrap, slice the cake, and enjoy its soft, fluffy texture!

Notes

  • Storage: It will last for 3 to 4 days in the fridge and one month in the freezer.
  • Bring eggs to room temperature: Room-temperature eggs mix more easily with other ingredients, helping the batter blend smoothly and rise evenly.
  • Let it rest for the best texture: You can enjoy the cake right away, but letting it rest for about half a day makes it even more moist and flavorful.
  • For an extra-fluffy texture: If you prefer a chiffon-like softness, separate the egg whites and yolks and beat them separately before combining.
  • Pan options: You can use a loaf pan, a square pan, or any similar-sized oven dish. If your pan size differs, adjust the baking time as needed.
Save the Recipe via Email (Recipe Posts)

Save This Recipe!

Enter your email and I’ll send this recipe straight to your inbox! You’ll also get new, simple recipes every week!

Video

Nutrition

Serving: 1sliceCalories: 67kcalCarbohydrates: 12.6gProtein: 1.8g

This nutritional information is estimated and provided for general reference only.

Course: Dessert
Cuisine: Japanese
Keyword: Japanese castella cake

Did You Make This Recipe?

Please leave a review!!

Similar Posts

Juri Austin wearing denim kimono and holding bento box.

Juri Austin

Hi! I’m Juri, founder of Chef JA Cooks and the creator and photographer of this site. I’m here to guide you in authentic yet easy-to-follow Japanese recipes! Let’s explore the world of Japanese cuisine together!

5 from 8 votes (8 ratings without comment)

Leave a Reply

Your email address will not be published. Required fields are marked *

Recipe Rating




4 Comments

  1. This sounds really good, and I plan to make it. But I’m very confused about something. You are calling it a 4 ingredient cake, but I count 5 ingredients in it. Was this a typo, or are you just not counting an ingredient?

    1. You’re absolutely right: if you include water, there are technically 5 ingredients.
      I titled it a 4-ingredient cake because I didn’t count water as an ingredient, since most people already have it on hand. I hope you enjoy making the cake!

  2. I believe there is an error in your recipe. 200 grams of flour? I had closer to bread dough. Then I looked at video for match castella. That listed 100 grams of flour. Also, have you tested for alternative flours?