By Esha Kamran 
This one-bowl 1-egg chocolate cake is perfect when you want a rich homemade dessert without using several bowls or a long list of ingredients. It has a soft, moist crumb, a deep chocolate flavor and a simple preparation method that requires only a whisk.
The recipe uses just one egg and common pantry ingredients, making it ideal for spontaneous baking, small celebrations or an easy family dessert. Serve it with powdered sugar for a simple finish, or cover it with chocolate frosting for an indulgent treat.
Why You’ll Love This One-Bowl Chocolate Cake
This easy chocolate cake is:
- Prepared in one mixing bowl
- Made with only one egg
- Moist, soft and deeply chocolatey
- Easy to prepare without an electric mixer
- Made with affordable pantry ingredients
- Suitable for birthdays and everyday desserts
- Easy to customize with different toppings
- Ready for the oven in approximately 15 minutes
Recipe Overview
- Preparation time: 15 minutes
- Baking time: 30–35 minutes
- Total time: Approximately 50 minutes, plus cooling
- Servings: Approximately 8
- Cake pan: One 8-inch round pan
- Oven temperature: 350°F or 175°C
- Difficulty: Easy
Ingredients
For the Chocolate Cake
- 1 cup or 125 grams all-purpose flour
- 1 cup or 200 grams granulated sugar
- â…“ cup or 30 grams unsweetened cocoa powder
- 1 teaspoon baking powder
- ½ teaspoon baking soda
- ¼ teaspoon fine salt
- 1 large egg, at room temperature
- ½ cup or 120 milliliters milk, at room temperature
- ¼ cup or 60 milliliters neutral oil
- 1 teaspoon vanilla extract
- ½ cup or 120 milliliters hot coffee or hot water
For the Optional Chocolate Frosting
- ½ cup or 115 grams unsalted butter, softened
- 1½ cups or 180 grams powdered sugar, sifted
- ¼ cup or 22 grams unsweetened cocoa powder
- 2–3 tablespoons milk
- ½ teaspoon vanilla extract
- A small pinch of salt
Important Ingredient Notes
Cocoa Powder
Natural unsweetened cocoa powder works particularly well in this recipe because its acidity reacts with the baking soda. It produces a balanced chocolate flavor and helps the cake rise properly. Dutch-process cocoa powder may also be used, but it can produce a slightly different rise and texture because it is less acidic.
Hot Coffee or Hot Water
Hot coffee strengthens the chocolate flavor without making the finished cake taste strongly of coffee. If you prefer not to use coffee, replace it with the same amount of hot water. The hot liquid helps bloom the cocoa powder, releasing more of its flavor and creating a richer chocolate cake.
Neutral Oil
Vegetable, sunflower or canola oil will keep the cake soft and moist. Oil remains liquid at room temperature, so the cake stays tender even after it has cooled. You can use melted butter instead, but the cake may become slightly firmer when refrigerated.
How to Make a One-Bowl 1-Egg Chocolate Cake
Step 1: Prepare the Pan and Oven
Preheat the oven to 350°F or 175°C. Grease an 8-inch round cake pan. Line the bottom with parchment paper and lightly grease the paper. This will make it easier to remove the cake from the pan after baking.
Step 2: Combine the Dry Ingredients
Place the all-purpose flour, granulated sugar, cocoa powder, baking powder, baking soda and salt in a large mixing bowl. Whisk until the ingredients are evenly combined. Break apart any visible lumps of cocoa powder so they do not create dry pockets in the finished cake.
Step 3: Add the Wet Ingredients
Make a small well in the center of the dry mixture. Add the egg, milk, oil and vanilla extract. Whisk gently from the center outward until the ingredients are mostly combined and no dry flour remains around the sides of the bowl. Avoid mixing the batter more than necessary.
Step 4: Add the Hot Liquid
Slowly pour the hot coffee or hot water into the bowl while whisking gently. Continue mixing just until the batter becomes smooth and evenly combined. The batter will appear thinner than a traditional cake batter. This is normal, so do not add extra flour.
Step 5: Bake the Cake
Pour the batter into the prepared cake pan. Bake for approximately 30–35 minutes. The exact baking time may vary depending on your oven and the type of pan you use. The cake is ready when:
- The center springs back when lightly touched
- The edges begin to pull slightly away from the pan
- A toothpick inserted into the center comes out with a few moist crumbs
- No wet batter remains on the toothpick
Avoid overbaking, as this can make the cake dry.
Step 6: Cool the Cake
Allow the cake to cool in the pan for approximately 10–15 minutes. Carefully run a thin knife around the edge of the cake. Turn it onto a wire cooling rack and remove the parchment paper. Leave the cake to cool completely before adding frosting or powdered sugar.
How to Make the Chocolate Frosting
Place the softened butter in a mixing bowl and beat until creamy. Add the powdered sugar, cocoa powder, two tablespoons of milk, vanilla extract and salt. Beat until the frosting becomes smooth and fluffy. If the frosting is too thick, add the remaining milk a little at a time. If it becomes too thin, add a small amount of additional powdered sugar. Spread the frosting over the completely cooled cake.
Tips for the Best Chocolate Cake
Measure the Flour Correctly
Adding too much flour can make the cake heavy and dry. For the most accurate result, weigh the flour with a kitchen scale. If using measuring cups, spoon the flour into the cup and level the top with a knife. Do not scoop the flour directly from the bag.
Use Room-Temperature Ingredients
A room-temperature egg and milk combine more smoothly with the remaining ingredients. This helps create an even batter and a tender cake texture.
Do Not Overmix
Mix the batter only until the ingredients are combined. Excessive mixing can develop too much gluten, resulting in a tougher cake.
Do Not Add Extra Flour
The batter will be quite thin after adding the hot coffee or water. This is the correct consistency and helps produce a moist cake.
Check the Cake Early
Begin checking the cake at approximately 28 minutes. Oven temperatures can vary, and a small cake may become dry if it is baked for too long.
Cool Before Frosting
The cake must be completely cool before frosting. If it is still warm, the butter in the frosting can melt and slide off the cake.
Easy Recipe Variations
Chocolate Chip Cake
Fold approximately â…“ cup of chocolate chips into the finished batter before pouring it into the pan. You can use milk, dark, semisweet or white chocolate chips.
Mocha Chocolate Cake
Use strong hot coffee and add ½ teaspoon of instant espresso powder to the dry ingredients. The espresso will intensify the chocolate flavor and add a subtle coffee note.
Orange-Chocolate Cake
Add 1 teaspoon of finely grated orange zest with the vanilla extract. The citrus flavor pairs beautifully with chocolate.
Nutty Chocolate Cake
Add approximately â…“ cup of chopped walnuts, pecans or hazelnuts to the batter. You can also sprinkle chopped nuts over the frosting before serving.
Dairy-Free Chocolate Cake
Replace the regular milk with unsweetened almond, soy or oat milk. Because the cake batter uses oil instead of butter, only the milk and optional frosting need to be adjusted to make the recipe dairy-free.
Cupcake Variation
Divide the batter between 10–12 lined muffin cups. Bake the cupcakes at 350°F or 175°C for approximately 17–21 minutes. Begin checking them at 17 minutes.
Serving Suggestions
This one-bowl chocolate cake can be served warm, at room temperature or slightly chilled. Try serving it with:
- Fresh strawberries or raspberries
- Vanilla ice cream
- Lightly sweetened whipped cream
- Chocolate sauce
- Caramel sauce
- Chopped toasted nuts
- Chocolate curls
- Fresh mint leaves
- A dusting of powdered sugar
For birthdays and celebrations, cover the cake with chocolate frosting and decorate it with sprinkles, berries or chocolate shavings.
How to Store the Cake
At Room Temperature
Store the unfrosted cake in an airtight container at room temperature for up to 2 days. Keep it in a cool, dry place away from direct sunlight.
In the Refrigerator
A frosted cake can be covered and refrigerated for up to 4 days. Allow refrigerated slices to sit at room temperature for approximately 20–30 minutes before serving. This helps restore the cake’s soft texture.
In the Freezer
Allow the unfrosted cake to cool completely. Wrap it tightly in plastic wrap, followed by a layer of aluminum foil. Freeze it for up to 2 months. Thaw the cake overnight in the refrigerator. Unwrap it and allow it to reach room temperature before frosting and serving.
Frequently Asked Questions
Can I Bake This Cake in a Square Pan?
Yes. You can use an 8-inch square cake pan. Because the batter will be slightly shallower in a square pan, it may bake a few minutes faster. Begin checking it at approximately 27 minutes.
Can I Use Hot Water Instead of Coffee?
Yes. Replace the coffee with the same amount of hot water. The cake will still have a rich chocolate flavor, although coffee can make the cocoa taste slightly deeper.
Why Is the Chocolate Cake Batter So Thin?
The hot liquid creates a thin batter, but this is intentional. It blooms the cocoa powder and adds moisture to the cake. Do not add additional flour to thicken it.
Can I Use Butter Instead of Oil?
Yes. Use the same amount of melted and slightly cooled butter. However, oil generally produces a softer and more consistently moist cake.
Can I Make This Cake Without Frosting?
Absolutely. The cake is flavorful enough to serve without frosting. Allow it to cool completely and dust the top with powdered sugar. You can also serve it with whipped cream, berries or ice cream.
How Do I Know When the Cake Is Fully Baked?
The cake should spring back gently when touched. A toothpick inserted in the center should come out with a few moist crumbs but no liquid batter.
Can I Double the Recipe?
Yes. Double all the ingredients and divide the batter between two 8-inch round pans. The baking time should remain similar, but begin checking both cakes at approximately 28 minutes.
One-Bowl 1-Egg Chocolate Cake Recipe Card
Description
A simple and moist chocolate cake made in one bowl with one egg, cocoa powder and everyday pantry ingredients.
Recipe Details
- Course: Dessert
- Cuisine: American-inspired
- Preparation time: 15 minutes
- Baking time: 30–35 minutes
- Total time: Approximately 50 minutes, plus cooling
- Servings: Approximately 8
- Oven temperature: 350°F or 175°C
- Pan size: One 8-inch round cake pan
Ingredients
- 1 cup all-purpose flour
- 1 cup granulated sugar
- â…“ cup unsweetened cocoa powder
- 1 teaspoon baking powder
- ½ teaspoon baking soda
- ¼ teaspoon salt
- 1 large egg
- ½ cup milk
- ¼ cup neutral oil
- 1 teaspoon vanilla extract
- ½ cup hot coffee or hot water
Quick Instructions
- Preheat the oven to 350°F or 175°C. Grease and line an 8-inch round cake pan.
- Whisk the flour, sugar, cocoa powder, baking powder, baking soda and salt together in a large bowl.
- Add the egg, milk, oil and vanilla. Whisk until mostly smooth.
- Slowly whisk in the hot coffee or hot water.
- Pour the batter into the prepared pan.
- Bake for 30–35 minutes or until a toothpick comes out with a few moist crumbs.
- Cool in the pan for 10–15 minutes before transferring the cake to a wire rack.
- Cool completely before frosting, decorating and serving.
Frequently Asked Questions
1. Can I Make This Chocolate Cake Without Coffee?
Yes. Replace the hot coffee with the same amount of hot water. Coffee intensifies the chocolate flavor, but the cake will still taste rich and delicious without it.
2. Why Is My Chocolate Cake Batter So Thin?
The batter becomes thin after adding the hot liquid. This is completely normal and helps bloom the cocoa powder while creating a moist, tender cake. Do not add extra flour.
3. Can I Use Butter Instead of Oil?
Yes. Replace the oil with an equal amount of melted and slightly cooled butter. However, oil generally keeps the cake softer and moister for longer.
4. Can I Turn This Recipe Into Cupcakes?
Yes. Divide the batter among 10–12 lined muffin cups and bake at 350°F or 175°C for approximately 17–21 minutes. Begin checking the cupcakes at 17 minutes.
5. How Should I Store the Chocolate Cake?
Store the unfrosted cake in an airtight container at room temperature for up to 2 days. A frosted cake can be refrigerated for up to 4 days. Allow chilled slices to reach room temperature before serving.
Final Thoughts
This one-bowl 1-egg chocolate cake proves that you do not need complicated techniques or expensive ingredients to create a delicious homemade dessert. The batter comes together quickly, the cleanup is minimal, and the finished cake is soft, moist and full of chocolate flavor. Keep it simple with powdered sugar for an everyday treat, or add chocolate frosting and decorations for a birthday or special occasion. Either way, this dependable chocolate cake is a recipe worth keeping.
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