Castella is a classic Japanese baked sponge cake with a dense, moist crumb and a sweet, honey-kissed flavor. Originating from Portuguese influences in the 16th century, this cake is made from just a few simple ingredients—eggs, sugar, flour, and honey—yet its texture is uniquely soft and tender. This recipe uses a warm water bath and a gentle folding technique to create that signature fine crumb, making it a rewarding bake for both beginners and experienced bakers.
Ingredients
- 6 large eggs (about 300 g / 10.5 oz), at room temperature
- 1 cup (200 g) granulated sugar
- 3 tablespoons (60 g) honey
- 2 tablespoons (30 ml) warm water
- 1 cup (120 g) bread flour (or all-purpose flour), sifted
- 1/4 cup (60 ml) milk, at room temperature
Instructions
- Preheat your oven to 320°F (160°C). Line a 9×5-inch (23×13 cm) loaf pan with parchment paper, allowing it to overhang the edges for easy removal.
- In a large mixing bowl, combine the eggs and sugar. Place the bowl over a pot of simmering water (make sure the bottom of the bowl doesn’t touch the water) and whisk gently until the sugar dissolves and the mixture feels warm to the touch, about 2-3 minutes.
- Remove the bowl from the heat. Using a hand mixer or stand mixer, beat the egg mixture on high speed until it becomes thick, pale, and triples in volume—about 5-7 minutes. The batter should form a ribbon that holds its shape for a few seconds when the whisk is lifted.
- In a small bowl, mix the honey with the warm water until dissolved. Add this honey mixture and the milk to the batter, and beat on low speed just until combined.
- Sift the flour into the batter in two additions. Using a rubber spatula, gently fold the flour into the egg mixture using a cutting motion, turning the bowl as you go. Fold until no streaks of flour remain, being careful not to deflate the batter.
- Pour the batter into the prepared loaf pan. Tap the pan on the counter a few times to release any large air bubbles.
- Place the loaf pan in a larger baking dish. Pour hot water into the outer dish until it comes about 1 inch (2.5 cm) up the sides of the loaf pan, creating a water bath (bain-marie).
- Bake for 40-45 minutes, or until the top is golden brown and a skewer inserted into the center comes out clean. The internal temperature of the cake should read about 200°F (93°C) if you want to check with a thermometer.
- Remove the loaf pan from the water bath and let it cool in the pan for 10 minutes. Then, using the parchment paper, lift the cake out and transfer it to a wire rack. Let it cool completely before slicing.
Tips
- Substitutions: If you don’t have bread flour, all-purpose flour works, but the cake will be slightly less chewy. For a gluten-free version, use a 1:1 gluten-free flour blend, though the texture will be more delicate.
- Storage: Castella stays moist at room temperature for up to 3 days when wrapped tightly in plastic wrap. For longer storage, wrap well and freeze for up to 1 month.
- Common Mistake: Overmixing the batter after adding flour will deflate the eggs and result in a dense, tough cake. Fold gently and stop as soon as the flour is incorporated.
- Honey Tip: Use a mild honey like acacia or clover so it doesn’t overpower the delicate flavor. If honey is too thick, warm it slightly to make it easier to mix.
Serving Suggestions
Castella is delicious on its own with a cup of green tea or coffee. For a richer treat, serve it with a dollop of whipped cream and fresh berries. It also makes a great base for trifles or as a side to ice cream.
Variations
- Matcha Castella: Replace 1 tablespoon of flour with 1 tablespoon of matcha powder, and sift together before adding.
- Chocolate Castella: Replace 2 tablespoons of flour with 2 tablespoons of unsweetened cocoa powder.
- Brown Sugar Castella: Substitute half of the granulated sugar with brown sugar for a deeper, caramel-like flavor.
Storage and Reheating
Store castella in an airtight container at room temperature for up to 3 days. For longer storage, wrap tightly in plastic wrap and freeze for up to 1 month. To serve, thaw at room temperature for about 30 minutes. If you prefer it warm, microwave a slice for 10-15 seconds or toast lightly in a toaster oven.
Frequently Asked Questions
Why is my castella dense or flat? This usually happens if the eggs weren’t beaten enough or if the flour was overmixed. Make sure the ribbon stage is reached, and fold gently.
Can I make this without a water bath? Yes, but the water bath helps the cake bake evenly and keeps it moist. Without it, the cake may dry out or crack on top.
Why does my cake have a rubbery texture? That can occur if bread flour is used and the batter is overmixed, developing too much gluten. Mix just until combined.
Can I use a hand whisk instead of an electric mixer? It’s possible but very labor-intensive. You’d need to whisk vigorously for 10-15 minutes to achieve the same volume.
How do I know when it’s done? Insert a skewer into the center—if it comes out clean, it’s done. The top should be golden brown and spring back when lightly pressed.
Can I reduce the sugar? You can reduce it to 3/4 cup (150 g), but the cake will be less sweet and may have a slightly different texture.
Related
- Slow Cooker Ham: Easy Crock Pot Recipe
- Slow Cooker Pork Roast with BBQ Sauce Recipe
- Simmering Short Ribs Recipe: Tender & Rich
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Safety notes: safe minimum internal temperatures from USDA FSIS; raw and undercooked fish guidance from the U.S. FDA. Food safety notes
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