Introduction
Castella Sheet Cake is a light, airy, and incredibly soft sponge cake inspired by the famous Japanese Castella. Baked in a sheet pan, this version offers the same delicate texture and subtle sweetness while making it easy to slice and serve for gatherings, celebrations, or afternoon tea. Its fine, moist crumb and rich egg flavor create an elegant dessert that’s delicious on its own or paired with fresh fruit and whipped cream.
Simple ingredients and careful mixing produce a bakery-quality cake that’s perfect for both beginners and experienced bakers.
Origin and Cultural Significance
Castella cake originated in Portugal during the 16th century and was introduced to Japan by Portuguese merchants. Over time, Japanese bakers refined the recipe into the beloved Castella (Kasutera) known today, featuring a fine, moist crumb and a delicate sweetness. The sheet cake version offers the same signature texture while making it more convenient for serving larger groups and special occasions.
Today, Castella remains one of Japan’s most cherished sponge cakes and is enjoyed throughout Asia and around the world.
Ingredients
Cake Batter
- 6 large eggs, room temperature
- 1 cup (200g) granulated sugar
- ¼ cup (60ml) whole milk
- ¼ cup (60ml) vegetable oil
- 2 tablespoons honey
- 1 teaspoon vanilla extract
- 1½ cups (190g) cake flour, sifted
- ¼ teaspoon salt
Optional Topping
- Powdered sugar
- Fresh strawberries
- Fresh blueberries
- Whipped cream
Servings
Serves 12–16 slices.
Optional Additions
Customize your Castella Sheet Cake with:
- Lemon zest
- Orange zest
- Matcha powder
- Cocoa powder
- Almond extract
- Fresh berries
- Chocolate drizzle
- Sweetened whipped cream
- Fruit preserves
- Toasted sliced almonds
Tips for Success
- Use room-temperature eggs for maximum volume.
- Sift the cake flour at least twice for an extra-light texture.
- Fold the batter gently to preserve the air.
- Avoid overmixing after adding the flour.
- Bake using gentle, even heat.
- Allow the cake to cool completely before slicing.
Instructions
Step 1: Prepare the Oven
Preheat the oven to 325°F (165°C).
Line a 9×13-inch (23×33 cm) baking pan with parchment paper.
Step 2: Prepare the Wet Ingredients
In a small bowl, combine:
- Milk
- Vegetable oil
- Honey
- Vanilla extract
Mix until smooth.
Step 3: Beat the Eggs
In a large mixing bowl, beat the eggs on medium-high speed.
Gradually add the sugar.
Continue beating for 8–10 minutes, until the mixture becomes pale, thick, and triples in volume.
Step 4: Fold the Batter
Sift together:
- Cake flour
- Salt
Gently fold the dry ingredients into the egg mixture in several additions.
Carefully fold in the milk mixture until fully incorporated.
Do not overmix.
Step 5: Bake
Pour the batter into the prepared baking pan.
Tap the pan lightly to remove large air bubbles.
Bake for 30–35 minutes, or until the top is lightly golden and springs back when gently touched.
A toothpick inserted into the center should come out clean.
Step 6: Cool and Serve
Allow the cake to cool in the pan for 10 minutes.
Transfer to a wire rack and cool completely.
Dust with powdered sugar or decorate with whipped cream and fresh berries before serving.
Description
Castella Sheet Cake is exceptionally soft, moist, and fluffy with a delicate, fine crumb and subtle honey-vanilla flavor. Its light texture and elegant appearance make it perfect for both everyday enjoyment and special occasions.
Nutritional Information
Approximate Values Per Slice
- Calories: 170–210
- Protein: 5g
- Carbohydrates: 26g
- Fat: 6g
- Saturated Fat: 1g
- Cholesterol: 75mg
- Sodium: 70mg
- Fiber: <1g
- Sugar: 15g
Values are approximate and may vary depending on the ingredients used.
Conclusion
Castella Sheet Cake is a beautifully light and elegant sponge cake that showcases the perfect balance of softness, moisture, and delicate sweetness. Easy to prepare and wonderfully versatile, it’s an excellent choice for tea time, celebrations, or whenever you’re craving a classic homemade cake.
Recommendation
Serve with:
- Fresh strawberries
- Blueberries
- Raspberries
- Whipped cream
- Vanilla ice cream
- Lemon curd
- Strawberry jam
- Honey
- Hot green tea
- Earl Grey tea
- Coffee
- Cappuccino
- Fresh orange juice
For an elegant dessert, serve slices of Castella Sheet Cake with freshly whipped cream, seasonal berries, and a cup of hot green tea or freshly brewed coffee for a light yet satisfying treat.
Embracing Healthful Indulgence
Homemade Castella Sheet Cake highlights the beauty of simple ingredients transformed through careful baking into an exceptionally light and flavorful dessert. Sharing this delicate sponge cake with family and friends creates memorable moments while celebrating the timeless art of homemade baking.