Castella Cake is a traditional Japanese sponge cake known for its soft, moist, and fluffy texture. It is made without butter, using whipped eggs for structure, which gives it a light and airy crumb. This cake is mildly sweet and perfect with tea or coffee.
🧾 Ingredients
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6 large eggs (room temperature)
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100 g white granulated sugar
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100 g bread flour or all-purpose flour (sifted)
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2 tablespoons honey
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2 tablespoons warm milk
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1 tablespoon vegetable oil
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1 teaspoon vanilla extract (optional)
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A pinch of salt
👩🍳 Instructions
Step 1: Prepare the Oven and Pan
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Preheat the oven to 160°C / 320°F (no fan).
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Line a 20×20 cm (8×8 inch) square pan with parchment paper, leaving some overhang.
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Prepare a water bath by placing hot water in a deep baking tray.
Step 2: Whip the Eggs
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Crack the eggs into a large mixing bowl.
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Add sugar and salt.
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Beat with an electric mixer on high speed for 8–10 minutes, until the mixture becomes:
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pale in color
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thick and fluffy
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triple in volume
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The batter should form a ribbon when lifted.
Step 3: Add Honey Mixture
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Mix honey with warm milk until dissolved.
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Add vegetable oil and vanilla extract.
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Gently fold this mixture into the egg batter using a spatula.
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Do not use a mixer
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Fold slowly to keep the air
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Step 4: Add Flour
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Add sifted flour in 2–3 batches.
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Gently fold using a bottom-to-top motion.
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Mix only until combined. Do not overmix.
Step 5: Bake
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Pour the batter into the prepared pan.
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Tap the pan lightly to remove large air bubbles.
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Place the pan into the water bath.
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Bake for 50–60 minutes at 160°C / 320°F.
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Do not open the oven during the first 40 minutes.
Step 6: Cool and Serve
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Remove the cake from the oven and let it rest for 10 minutes.
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Lift out using the parchment paper.
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Cool completely on a wire rack.
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For extra moisture, wrap the cake in plastic wrap and rest for a few hours before slicing.
✅ Tips for Perfect Castella Cake
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Eggs must be room temperature
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Always sift the flour
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Fold gently to avoid deflating the batter
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Water bath is essential for moisture
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Avoid overbaking to keep the cake soft
📌 Storage
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Store at room temperature for 1 day
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Refrigerate up to 3 days (wrap well)
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Bring to room temperature before serving
