Enjoy a 10% discount on all orders over $60

How To Make Castella Cake – A Classic Japanese Sponge Cake

Discover the secrets to baking a light and fluffy Castella Cake with our easy-to-follow recipe. Perfect for tea time or any special occasion!

May 17, 2024
Castella CakePhoto By Canva
Difficulty Easy
Servings 8 people
Preparation 20 mins
Cooking 50 mins
Total 70 mins



  1. Preheat the oven to 325 °F (165 °C). Line a 9x9 inch baking pan with parchment paper.
  2. In a large bowl, beat the eggs with the granulated sugar until the mixture is thick and pale, approximately 8 minutes using an electric mixer.
  3. In a small bowl, combine honey and warm water, then microwave for about 20 seconds. Slowly pour the honey mixture into the egg mixture while continuously mixing.
  4. Gradually fold in the sifted bread flour using a spatula, making sure not to deflate the batter.
  5. Pour the batter into the prepared baking pan, smoothing the top with a spatula. To remove any air bubbles, gently drop the pan from a small height onto your counter a couple of times.
  6. Bake for about 50 minutes or until a toothpick inserted into the center comes out clean.
  7. Allow the cake to cool in the pan for 10 minutes, then remove it and peel off the parchment paper. Cool completely on a wire rack.
  8. Dust with powdered sugar before slicing, if desired.
Nutrition Facts
Serving Size 1 Castella Cake
Serves 8
Amount Per Serving
% Daily Value*
Protein 10 g20%
Total Fat 15 g19.2%
*The % Daily Value (DV) tells you how much a nutrient in a serving of food contributes to a daily diet. 2,000 calories a day is used for general nutrition advice.


  • For best results, ensure your eggs are at room temperature to help achieve maximum volume when beaten.
  • When folding the flour into the egg mixture, use a gentle hand to avoid deflating the air you've whipped into the eggs. This ensures the cake's signature lightness.
  • Avoid opening the oven door during the early stages of baking as sudden temperature changes can cause the cake to collapse.
  • For clean slices, use a serrated knife and clean it between cuts.
  • Store the cake in an airtight container at room temperature for up to three days or refrigerate it for longer storage.
Rate This Recipe

Castella Cake, or Kasutera in Japanese, is a popular sponge cake renowned for its fine texture and subtle sweetness. Originating from Nagasaki, Japan, this cake has become a beloved treat worldwide. Made with simple ingredients, Castella Cake is known for its moist, fluffy texture, achieved by carefully whipping eggs and precisely baking. This recipe will guide you through the steps to create a perfect Castella Cake, ideal for celebrations or a cozy tea time.

Origins of The Castella Cake

Castella cake, or "Kasutera" in Japanese, has a history as rich as its flavor. Originally brought to Japan by Portuguese merchants in the 16th century, this sponge cake has evolved into a beloved Japanese confection. Its texture is finer and moister than traditional sponge cakes due to a unique method of incorporating air into the eggs and carefully controlling the baking process.

The traditional Castella cake recipe calls for a simple blend of flour, eggs, sugar, and honey, highlighting the cake's hallmark feature: its subtle sweetness and moist, fluffy texture. Over the years, variations have emerged, including matcha and chocolate flavors, but the classic honey version remains a favorite.

Castella cakes are particularly popular in Nagasaki, where they have been refined over centuries. They are often given as gifts due to their luxurious texture and elegant simplicity. This cake's enduring popularity is a testament to its delicious, timeless appeal, making it a staple in both homes and specialty bakeries across Japan. Whether enjoyed with tea or as a dessert, the Castella cake offers a slice of Japanese culinary history in every bite.


Here are some popular variations of Castella Cake that you might enjoy experimenting with:

Matcha Castella Cake: Incorporate matcha green tea powder into the batter for a delightful twist that adds a subtle earthy flavor and a vibrant green color.

Chocolate Castella Cake: Add cocoa powder to the batter to create a chocolate version of this classic cake, offering a rich and decadent taste.

Honey Castella Cake: Increase the amount of honey in the recipe for a sweeter, more aromatic cake that emphasizes honey’s natural flavors.

Cheese Castella Cake: Layer or mix in finely shredded cheese within the batter for a savory-sweet variant that pairs well with coffee or tea.

Citrus Flavored Castella Cake: Add lemon or orange zest to the batter for a refreshing citrus note, enhancing the cake's light texture with bright flavors.

These variations allow you to enjoy the traditional texture of Castella while experimenting with flavors that can complement its delicate sweetness.

How To Use Castella Cake?

Here are some creative ways to use leftover Castella cake:

  • Trifle: Cube the Castella cake and layer it with fruit, custard, and whipped cream to make a delightful trifle.
  • French Toast: Slice the Castella cake and dip it in a mixture of egg, milk, and a touch of vanilla, then fry until golden brown for a decadent breakfast treat.
  • Cake Pops: Crumble the leftover cake, mix it with frosting, form into balls, dip in chocolate or candy melts, and decorate for fun and festive cake pops.
  • Bread Pudding: Use the cake as the base for a bread pudding, adding eggs, milk, sugar, and your favorite spices.
  • Dessert Panini: Make a sweet panini with slices of Castella cake, your favorite chocolate spread, and sliced fruit, then press and grill until warm and gooey.

These ideas can help you transform your leftover Castella cake into exciting new desserts!

How To Store Castella Cake?

To store Castella Cake and maintain its moist texture and flavor:

Cool Completely: Ensure the cake is completely cooled before storage to prevent condensation which can make the cake soggy.

Wrap Tightly: Wrap the cake tightly in plastic wrap or aluminum foil. This helps prevent air from drying out the cake and maintains its soft texture.

Refrigerate: For longer storage, place the wrapped cake in the refrigerator. It will stay fresh for about a week.

Room Temperature: If consuming within a couple of days, you can store it at room temperature. Keep it in an airtight container to maintain its moisture.

Freeze for Longevity: If you need to store the cake for longer than a week, freezing is a viable option. Wrap it tightly and place it in a freezer-safe bag. Thaw overnight in the refrigerator before serving.

Recipe byPetite Gourmets

Did you make this recipe?

Tag @PETITEGOURMETS using the hashtag #PGRECIPES and share on Instagram. We'll feature you on our site.

Shop on Petite Gourmets