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Chocolate Gateau at a Glance
Chocolate Gateau (ガトーショコラ), or gâteau au chocolat, is a French-style chocolate cake popular in Japanese kissaten cafés and cake shops. With a deep chocolate truffle-like flavor and a fluffy, cake-like crumb, it’s typically served with fresh fruit and whipped cream.
Why You’ll Love It
- Developed with a Japanese pastry expert. I made this recipe with Haruka, a Japanese pastry assistant, who shared her authentic techniques and insights.
- Not a fudgy brownie. My folding technique gives you a tender, airy texture compared to a dense chocolate gateau from a French patisserie.
- Balanced sweetness. Japanese desserts like this cake are less sweet than American desserts so you can always go back for a second slice.
What readers say
GRACE VOSS
“The detailed instructions + photos were great. The baking paper cut/fold technique worked perfectly and I will be using that again on other recipes!”
My Recipe Story
I’ve always wanted to share more Japanese sweets and pastries on Just One Cookbook. Since baking isn’t my specialty, I welcomed Haruka, a Japanese pastry assistant, to our team to help develop authentic Japanese treats for our readers.
This chocolate gateau (ガトーショコラ) was one of the first recipes we worked on together. We wanted to create a special dessert for holiday gatherings and celebrations. Something that was beautiful, delicious, and easy to make ahead.
The result was everything I hoped for! It’s the kind of dessert I’m proud to bring to a gathering or serve to family and friends. In Japanese, we’d call it kanpeki (完璧)—perfect!
If you are looking for more celebration-worthy pastries, try my Castella Cake, Panettone Bread Pudding, and Japanese Strawberry Shortcake recipes next!
Key Ingredients for Gateau Chocolat
- Cake flour – Creates a tender crumb thanks to its lower protein content. All-purpose flour works, but the texture will be slightly different.
- Dutch-process cocoa powder – Gives the cake a deep chocolate flavor and rich, dark color.
- Salt – Balances the sweetness and enhances the chocolate flavor.
- Eggs – The yolks add richness, while the whipped whites give the cake structure and a lighter texture.
- Unsalted butter – Adds moisture and richness. Cut into small pieces for even melting with the chocolate.
- Chocolate chips – Use good-quality baking chocolate. I prefer a 2:1 blend of semisweet chocolate (46% cacao) and extra dark chocolate (63% cacao).
- Granulated sugar – Sweetens the cake and helps stabilize the whipped egg whites.
- Milk – Helps keep the chocolate batter smooth. Substitute heavy cream for a richer taste.
- For decorating – Fresh strawberries or raspberries, whipped cream, and confectioners’ sugar.
How to Make Chocolate Gateau
- Prepare the chocolate mixture. Melt the chocolate chips and butter in a double boiler set over barely simmering water until smooth, then set aside to keep warm.
- Prepare the yolk mixture. Whisk egg yolks and sugar together until thick, pale, and ribbony in texture.
- Combine chocolate and yolk mixtures. Slowly blend the warm chocolate mixture into the egg yolks until smooth, then whisk in warm milk.
- Whip the egg whites. Beat the egg whites with sugar until very soft peaks form.
- Fold the batter. Gently incorporate the egg whites into the chocolate mixture, then fold in the sifted dry ingredients.
- Bake, cool, and refrigerate. Pour the batter into a lined pan and gently tap out air bubbles. Bake at 350°F (175°C) for 55–60 minutes, checking for doneness with a skewer. Cool completely, then refrigerate overnight.
- Invert, unmold, and decorate. Unmold the chilled cake onto a serving plate, then top with whipped cream, fresh strawberries or raspberries, and a dusting of confectioners’ sugar before serving.
Nami’s Recipe Tips
Keep these tips in mind for the best results every time.
- Choose a light-colored cake pan. Dark pans absorb more heat and may overbake the cake. If using one, reduce the oven temperature by 25°F (15°C) and check for doneness 10 minutes earlier.
- Check your oven temperature. Use an oven thermometer to make sure it’s fully preheated. Many ovens run hotter or cooler than their settings indicate.
- Measure ingredients accurately. I recommend using a kitchen scale. If using cups, fluff and sprinkle the flour and cocoa powder into the measuring cups, then level off. Scooping directly can pack in too much and make the cake dry.
- Use room-temperature eggs. Take them out of the refrigerator 30–60 minutes before starting. Cold yolks can cause the warm chocolate mixture to harden.
- Keep the chocolate warm. Melt it gently in a double boiler, keeping water and steam away. Remove from the heat at 122°F (50°C) and keep the mixture at 104–122°F (40–50°C) so it blends smoothly into the batter..
- Beat egg whites to very soft peaks. The peaks should gently droop when you lift the whisk. Avoid overbeating, as stiff whites are harder to incorporate.
- Fold gently to preserve air. Use a scooping motion when adding the egg whites. Add the dry ingredients when the batter looks marbled, then fold from the bottom with a spatula until just combined.
- Prevent shrinking after baking. Drop the cake pan once on the countertop after removing it from the oven to release trapped hot air.
How to Line a Round Baking Pan
I learned this clever trick from a friend! It takes a little extra time, but you can line your cake pan using one sheet of parchment paper with minimal waste.
- Prepare the bottom lining. Trace an 8-inch (20-cm) round cake pan on parchment paper. Cut just inside the line and set aside. Alternatively, use a precut parchment circle.
- Prepare the side lining. Fold the remaining rectangular paper in half lengthwise and crease the center. With the paper still folded, fold up the long edges by ½ inch (1.3 cm) and crease.
- Cut the notches. Cut notches every ½ inch (1.3 cm) along the folded edges, stopping at the crease. Unfold the paper and cut along the center crease to make two strips with notched flaps.
- Line the sides. Place the strips against the pan’s sides, with the notched flaps lying flat on the bottom. Overlap the ends.
- Line the bottom. Place the parchment circle over the flaps. No greasing needed!
Make Ahead Tips
- Bake 1–2 days ahead. Chocolate Gateau tastes even better after chilling, as the flavor deepens and the texture becomes fudgier. Keep it tightly wrapped in the pan and refrigerate until ready to serve.
- Decorate just before serving. Add fresh whipped cream and fruit at the last minute for the best appearance and freshness.
- Let it soften slightly. Remove the cake from the refrigerator 10–15 minutes before serving for the best texture.
Storage Tips
- Refrigerate: Store in an airtight container for up to 3–4 days. If topped with fresh whipped cream, enjoy within 1–2 days.
- Freeze: Wrap undecorated cake or individual slices tightly in plastic wrap, then place in a freezer bag or airtight container for up to 2 weeks.
- Thaw: Defrost overnight in the refrigerator, then bring to room temperature before serving.
Using Different Cake Pan Sizes
I use an 8-inch (20-cm) round cake pan in my recipe, but you can adapt my recipe if you want to use a larger or smaller cake pan.
- For a 6-inch (15-cm) round cake pan:
- use 3 large eggs;
- use 60% (3/5) of the other ingredients; and
- bake for a shorter time (check with a skewer).
- For a 9-inch (23-cm) round cake pan:
- use 6 large eggs;
- use 120% (6/5) of the other ingredients; and
- bake for a longer time (check with a skewer).
FAQ
What kind of chocolate is best?
Use good-quality baking chocolate with a cacao percentage that suits your taste. I prefer a blend of semisweet (46%) and extra dark (63%) chocolate for a balanced flavor.
Can I substitute Dutch-process cocoa powder with natural cocoa powder?
Your cake will be lighter in color since natural cocoa is inherently lighter than Dutch-process. Due to the acidity of natural cocoa, you may notice a subtle tanginess or a slightly bitter taste.
You can find Dutch-process cocoa powder at many gourmet food stores, like Whole Foods and Williams-Sonoma. You can also buy the same one I use on Amazon.
How can I add espresso powder to this recipe?
Espresso powder can be added to the recipe for an intensified, complex, and deep chocolate flavor. Since it’s very concentrated, you only need half to one teaspoon (otherwise, too much coffee flavor) while the chocolate is melting.
Baking Tools You Need
- Kitchen scale
- 8-inch (20-cm) round cake pan
- Parchment paper
- Instant-read thermometer
- Fine-mesh sieve
- Balloon whisk
- Electric stand mixer
- Mixing bowls
- Metal bowls
Readers’ Chocolate Gateau Recipes
Chocolate Gateau was the JOC Cooking Challenge for December 2023. Check out the beautiful chocolate gateau created by JOC readers!
I’d love to hear how yours turned out! 💛 Please leave a star rating and comment below to share your experience. Your feedback not only supports Just One Cookbook but also helps other home cooks discover recipes they can trust.
Chocolate Gateau (Chocolate Cake)
Moist and rich Chocolate Gateau recipe is a classic dessert found in cafes and pastry shops across Japan. Topped with strawberries and fresh whipped cream, this decadent cake is a beautiful and elegant sweet treat to make at home for any festive occasion.
Ingredients
Servings: (8-inch, 20-cm) cake
- ¼ cup cake flour (weigh for accuracy; if using cups, use the fluff-and-sprinkle method; see homemade cake flour)
- ¾ cup Dutch-process cocoa powder (I use Guittard; weigh for accuracy)
- ⅛ tsp Diamond Crystal kosher salt (use half the amount or the same weight for table salt)
- 5 large eggs (50 g each w/o shell) (room temperature)
- 9 Tbsp unsalted butter (room temperature; 1 stick plus 1 Tbsp)
- ¾ cup chocolate chips (use good-quality baking chocolate; I combine ½ cup (100 g) of semi-sweet (46% cacao) and ¼ cup (50 g) of extra dark (63% cacao))
- ½ cup sugar (for the egg yolks)
- 2 Tbsp milk (room temperature; heavy cream works for a richer taste)
- ½ cup sugar (for the egg whites)
For the Strawberry and Whipped Cream Decoration (Option 1)
- ⅔ cup heavy (whipping) cream (cold)
- 4 tsp sugar (10% of the cream's weight)
- confectioners’ sugar (for dusting)
- ½ lb strawberries (hulled)
- fresh mint leaves (optional garnish)
For the Quick Raspberry Decoration (Option 2)
- 10 raspberries
- confectioners’ sugar (for dusting; I used non-melting snow sugar)
Instructions
Before You Start
- Measure: Gather all the ingredients. I recommend weighing your ingredients with a kitchen scale (click the Metric button). If using cups, fluff and sprinkle flour and cocoa powder into the measuring cups, and level off. Avoid scooping directly, which can pack in too much.Preheat the Oven: Position a rack in the center and preheat to 350ºF (175ºC). For a convection oven, reduce the temperature by 25ºF (15ºC).
To Line the Baking Pan
- Use an 8-inch (20-cm) light-colored round cake pan. See the blog post for other pan sizes.Trace the bottom of the round cake pan on parchment paper. Use the remaining rectangular sheet (about 8 × 12½ inches / 20 × 32 cm) for the sides. Fold it in half lengthwise and crease the center.
- Cut just inside the traced circle and set aside. Separate the rectangular sheet if still attached.
- With the rectangle folded lengthwise, fold up the long edges by ½ inch (1.3 cm) and crease. Cut notches every ½ inch (1.3 cm), stopping at the crease.
- Unfold and cut along the center crease to make two strips with notched flaps. Line the pan's sides, placing the flaps flat against the bottom. Overlap the ends.
- Place the parchment circle over the flaps to cover the bottom. No greasing needed.
To Prepare the Ingredients
- Combine ¼ cup cake flour, ¾ cup Dutch-process cocoa powder, and ⅛ tsp Diamond Crystal kosher salt (use half the amount or the same weight for table salt). Sift through a fine-mesh sieve.
- Press any cocoa lumps through the sieve with a spoon. Repeat sifting 2–3 times, then set aside.
- Wipe the mixer bowl clean and dry to remove any grease or moisture. Separate 5 large eggs (50 g each w/o shell), placing the whites in the mixer bowl and the yolks in a separate large bowl. Nami's Tip: Keep the egg whites at room temperature. Room-temperature egg yolks help prevent the warm chocolate mixture from hardening when combined.
- Set a heatproof bowl over a saucepan of barely simmering water to make a double boiler. Cut 9 Tbsp unsalted butter into smaller cubes.
To Prepare the Egg Yolk Mixture
- Break up the egg yolks with a whisk, then add ½ cup sugar.
- Whisk until thick and pale. Set aside.
To Prepare the Chocolate Mixture
- Add the butter and ¾ cup chocolate chips to the double boiler. Stir occasionally until melted and smooth, bring the mixture to 122ºF (50ºC). Use an instant-read thermometer for accuracy.Nami's Tip: Keep water and steam away from the chocolate to prevent seizing.
To Combine the Yolk and Chocolate Mixtures
- Once the chocolate mixture reaches 122ºF (50ºC), remove the bowl from the double boiler. Wipe its bottom dry to prevent moisture from dripping into the batter.
- Add one-quarter of the warm chocolate mixture to the yolks. Whisk until smooth.
- Continue adding the chocolate mixture in three more additions, whisking well after each. Keep the mixture warm to prevent the chocolate from hardening.
- Microwave 2 Tbsp milk for 10-second intervals until steaming. Add to the batter and whisk until smooth. Nami's Tip: The milk will help warm up the batter, preventing the chocolate from hardening.
To Beat the Egg Whites
- Using the whisk attachment, beat the room-temperature egg whites on medium speed until foamy.
- Gradually add ½ cup sugar in three additions while beating.
- Increase to medium-high speed and beat until very soft peaks form.
- Lift the whisk to check the texture. The whites should fall softly a few times, then stop—not run off continuously. Do not overbeat.
To Add the Egg Whites and Dry Ingredients
- Add one-third of the whipped egg whites to the chocolate batter. With a whisk using a scooping motion, stir gently until marbled.
- Add all the sifted dry ingredients.
- Continue mixing with a scooping motion until most of the dry ingredients are incorporated. A few dry spots should remain.
- Add the remaining egg whites. Switch to a silicone spatula and gently fold from the bottom to preserve the air.
- Fold just until the batter is uniform, with no white streaks or dry spots. Avoid overmixing or undermixing.
- Pour the batter into the prepared pan in one spot. Drop the pan twice on the countertop to release trapped air bubbles.
To Bake
- Bake at 350ºF (175ºC) for 55–60 minutes, until a toothpick inserted near the center comes out with moist crumbs but no wet batter.Nami's Tip: For a dark-colored pan, reduce the temperature by 25°F (15°C) and start checking at 45 minutes.
- Remove from the oven and firmly drop the pan once on the countertop to release trapped steam. Cool completely in the pan on a wire rack. Wrap tightly and refrigerate overnight for the best flavor and texture. The cake may sink slightly as it cools.
To Unmold the Cake and Serve
- Remove the cake from the refrigerator about 15 minutes before serving. Run a knife around the edges, then carefully invert the cake onto your hand to release it from the pan.
- Flip the cake right side up onto a serving plate or cake stand. Remove the parchment from the sides, leaving the bottom parchment in place.
To Decorate with Strawberries and Whipped Cream (Option 1)
- Whip ⅔ cup heavy (whipping) cream with 4 tsp sugar until medium peaks form.Nami's Tip: If whisking by hand, set the bowl over ice water to keep the cream cold.
- The peaks should hold their shape but curl at the tips. Lightly dust the cake with confectioners’ sugar. Place the whipped cream in the center.
- Spread the cream into a circle, leaving a 1-inch (2.5-cm) border around the edge.
- Halve ½ lb strawberries lengthwise. Arrange the first ring of strawberries cut side up, with the tips pointing outward, near the edge of the whipped cream. Add a second ring cut side down, slightly overlapping the first ring.Nami's Tip: Arrange the strawberries slightly unevenly for a more natural look.
- Arrange the remaining strawberries in the center. Garnish with fresh mint leaves and lightly dust with confectioners’ sugar.
To Decorate with Raspberries (option 2)
- Dust the cake with confectioners’ sugar and decorate the cake with 10 raspberries.
To Store
- Store leftover cake in an airtight container in the refrigerator for 3–4 days or freeze for up to 2 weeks.
Nutrition
Serving: 18-inch cake, Calories: 2846kcal, Carbohydrates: 318g, Protein: 53g, Fat: 184g, Saturated Fat: 107g, Polyunsaturated Fat: 10g, Monounsaturated Fat: 55g, Trans Fat: 3g, Cholesterol: 1036mg, Sodium: 502mg, Potassium: 2127mg, Fiber: 38g, Sugar: 229g, Vitamin A: 4404IU, Vitamin C: 1mg, Calcium: 327mg, Iron: 21mg
The nutrition facts shown are generated by an online calculator and are estimates only. Please consult a professional nutritionist for specific dietary needs.
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