This adorable 6-inch chocolate cake is perfect when you want a small, rich dessert made with cocoa powder. Ideal for two on date night, Valentine’s Day, or for a single chocolate lover, this mini chocolate cake delivers moist, chocolatey goodness in a perfectly sized single layer.
This recipe is the chocolate counterpart to a classic mini vanilla cake. The method is simple and mostly one-bowl: whisk the wet ingredients, sift in the dry, stir in hot water to bloom the cocoa, then bake. The result is a tender, moist crumb with an intense chocolate flavor — espresso powder or hot coffee enhances the cocoa and balances the sweetness.
How do you make a small chocolate cake from scratch?
This small chocolate cake comes together quickly and uses one bowl for the batter. The key steps are: whisk eggs, sugar, and vanilla; add oil and buttermilk; sift in flour, cocoa, leavening, espresso powder, and salt; then stir in hot water. Pour into a prepared 6-inch pan and bake until set. The hot water intensifies the chocolate and yields a slightly fudgy texture.
Mini Chocolate Cake Ingredients
These pantry staples make a single-layer 6-inch cake. See the recipe card below for exact measurements.
- 1 large egg (room temperature)
- Pure vanilla extract
- Granulated sugar
- Vegetable oil (keeps the cake moist)
- Buttermilk (adds tenderness and a bit of tang; see substitution below)
- All-purpose flour (weigh for accuracy if possible)
- Unsweetened cocoa powder (for chocolate flavor)
- Baking powder and baking soda (for lift)
- Espresso powder (key for enhancing chocolate; substitute hot coffee if needed)
- Salt
- Hot water (helps bloom the cocoa)
For the chocolate buttercream you’ll need salted butter, powdered sugar, cocoa powder, heavy cream, and vanilla extract.
Equipment Needed
Essential equipment: a 6-inch round cake pan, a whisk or hand mixer, mixing bowl, sifter, parchment paper, and a cooling rack. These tools make the process smooth and keep cleanup easy.
Buttermilk substitution
If you don’t have buttermilk, substitute 1/3 cup whole milk mixed with 1 teaspoon vinegar. Let it sit briefly before using to mimic buttermilk’s acidity.
How to make a mini chocolate cake, step-by-step
This is a one-bowl recipe for the batter. Follow these simplified steps:
- Preheat oven to 350°F. Prepare and line a 6-inch cake pan with parchment and spray with baking spray.
- Whisk the egg, vanilla, and sugar until combined and slightly thickened.
- Whisk in oil, then buttermilk until smooth.
- Sift in flour, cocoa, baking powder, baking soda, espresso powder, and salt. Stir gently until just combined.
- Stir in hot water to bloom the cocoa and loosen the batter.
- Pour batter into the prepared pan, tap lightly to remove air bubbles, and bake until a toothpick comes out clean (about 25–30 minutes — timing can vary by oven).
For the chocolate buttercream:
- Cream softened butter until light and fluffy.
- Gradually add powdered sugar and cocoa powder, then vanilla.
- Add heavy cream a little at a time and beat until the frosting is thick and spreadable. Frost the cooled cake.
Tips and F.A.Q.
Mini cakes typically range from 2 to 6 inches. A 6-inch single-layer cake is great for 4–6 servings depending on slice size — perfect for a small gathering or dessert for two.
Using vegetable oil and buttermilk helps keep the cake moist and tender. Oil stays liquid at room temperature, and the acidity in buttermilk tenderizes the crumb for a softer texture.
This 6-inch mini chocolate cake yields about 4–6 slices depending on how generous the portions are.
More mini and small-batch recipes you’ll love
- Mini Carrot Cake
- Mini Vanilla Cake with Easy Vanilla Buttercream
- Small Batch Chocolate Chip Cookies with Brown Butter and Sea Salt
- Butter Pecan Cake with Cream Cheese Frosting
- Brown Sugar Shortbread Cookies
📖 Recipe
Mini Chocolate Cake – Easy Small Chocolate Cake Recipe
Equipment you may need
- Mixing bowls
- Whisk
- Measuring cups and spoons
- Hand or stand mixer
- Parchment paper
- 6-inch round cake pan
- Sifter
- Rubber spatula and offset spatula
Ingredients
- Baking spray or pan release
- 1 large egg (50 g)
- 1 tsp pure vanilla extract
- 2/3 cup granulated sugar (about 134 g)
- 3 tbsp vegetable oil
- 1/3 cup buttermilk (room temperature)
- 2/3 cup all-purpose flour (about 86 g)
- 3 tbsp unsweetened cocoa powder
- 3/4 tsp baking powder
- 1/8 tsp baking soda
- 1/4 tsp salt
- 1/2 tsp espresso powder (or substitute with hot coffee)
- 1/4 cup hot water
Chocolate Buttercream Frosting
- 1/2 cup (1 stick) salted butter, softened
- 1 3/4 cups powdered sugar (about 210 g)
- 1/4 cup unsweetened cocoa powder
- 2 tbsp heavy cream
- 1 1/2 tsp pure vanilla extract
Instructions
- Preheat oven to 350°F. Spray and line a 6-inch cake pan with parchment.
- In a large bowl, whisk the egg, vanilla, and sugar until combined and slightly thickened.
- Whisk in the oil, then the buttermilk until smooth.
- Sift in the flour, cocoa, baking powder, baking soda, espresso powder, and salt. Stir gently until just combined.
- Stir in the hot water to bloom the cocoa and loosen the batter.
- Pour the batter into the prepared pan, tap to release air bubbles, and bake 25–30 minutes or until a toothpick inserted into the center comes out clean. Allow the cake to cool completely before frosting.
Prepare the chocolate buttercream
- Cream the softened butter for 1 minute until light and fluffy.
- Gradually beat in powdered sugar and cocoa powder until smooth, then add vanilla.
- Add heavy cream a little at a time and beat to a spreadable consistency. Frost the cooled cake.
Notes
Buttermilk substitute: Use 1/3 cup whole milk with 1 teaspoon vinegar stirred in and allowed to sit briefly. Frosting: You may have extra frosting depending on how you decorate. Storage: Store in an airtight container at room temperature up to 2 days, refrigerate up to 5 days, or freeze well wrapped for up to 2 months.
Nutrition (per slice)
Calories: 524 kcal | Carbohydrates: 73 g | Protein: 5 g | Fat: 26 g | Saturated Fat: 13 g | Cholesterol: 79 mg | Sodium: 264 mg | Fiber: 3 g | Sugar: 58 g
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