Mini chocolate cake is useful when you want a proper frosted dessert without making two large layers. This batter fits a six-inch round pan and produces one layer to cover with chocolate buttercream. Six small slices make a modest dessert, or you can cut fewer, larger portions.
The pan size matters for mini chocolate cake. A vague “small pan” can mean several very different shapes, each with its own baking time. Use a six-inch round pan with sides at least two inches high, and allow cooling time before putting on the frosting.
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Why This Recipe Works
Oil keeps the cake batter simple to mix with a whisk. The frosting uses softened butter, so there is no need to coordinate creaming butter for both mixtures. Mini chocolate cake has cocoa in the batter and in the topping, giving a clear chocolate flavor without needing melted bars.
The small amount of hot water is stirred into the batter at the end. Measure that tablespoon rather than pouring in a large splash. A small cake formula has less tolerance for unintended changes than a much larger batch.
Ingredients for Mini Chocolate Cake
For mini chocolate cake, spoon and level the flour and sift any lumpy cocoa. Check that baking powder and baking soda are fresh. Both are included; do not treat them as interchangeable measures. The milk and egg can sit out briefly while you prepare the pan, but return other perishable ingredients to the refrigerator.
The frosting’s one to one and a half cups of powdered sugar is a range, not two separate additions. Start with the lower amount, then adjust sweetness and stiffness. Its cream is measured in teaspoons. Vanilla belongs to the frosting in this ingredient list, rather than to an unmeasured addition in the cake batter.
For the cake
- 2/3 cup all-purpose flour ((84 grams))
- 1/4 cup cocoa powder ((22 grams))
- 1/2 teaspoon baking soda
- 1/4 teaspoon baking powder
- 1/8 teaspoon salt ((a very small pinch))
- 1/4 cup vegetable oil ((or canola oil, 60 ml))
- 2/3 cup granulated sugar ((133 grams))
- 1 large egg
- 1/3 cup milk ((80 ml, 2% or whole milk is best))
- 1 tablespoon boiling water ((15 ml))
For the frosting
- 1/3 cup unsalted butter ((softened, 75 grams))
- 1 – 1 1/2 cups powdered sugar ((110-165 grams, sifted))
- 3 tablespoons cocoa powder ((17 grams, sifted))
- 1/2 teaspoon vanilla extract
- pinch salt
- 2-3 teaspoons whipping cream ((10-15 ml, or milk))
Pan Preparation
- cooking spray (as needed to grease a 6-inch round pan)
How to Make Mini Chocolate Cake
Heat the oven to 350°F and line the base of the six-inch pan with parchment. Lightly grease the sides. Whisk flour, cocoa, soda, baking powder, and salt in one bowl. In another, mix oil, sugar, egg, and milk until evenly combined. For mini chocolate cake, combine the two mixtures and add the tablespoon of boiling water, stirring only until smooth.
Spread the batter into the pan and bake for approximately thirty to thirty-five minutes. Begin checking near the lower end; the center should no longer wobble, and a skewer should emerge clean or with a few moist crumbs rather than wet batter. Ovens and pans differ, so those signs are more useful than adding a fixed extra bake automatically.
Cool mini chocolate cake in the pan for fifteen minutes, then gently turn it onto a rack. Give it around another hour to lose its warmth, allowing longer if necessary. A cake that still feels warm on the base is not ready for buttercream.
Beat the softened frosting butter smooth. Add sifted cocoa, half a cup of powdered sugar, vanilla, and the pinch of salt on low speed. Gradually add more sugar within the listed range. Beat in cream by the teaspoon until the frosting spreads comfortably, then cover the fully cooled cake.
How to Serve
Serve mini chocolate cake in small wedges with berries or a spoonful of plain yogurt if you want something fresh alongside the frosting. Cut with a clean knife, wiping between slices for a tidier finish. This single layer needs no splitting or stacking.
If you are serving after dinner, bake earlier in the day so cooling can happen without rushing. Set the cake on its serving plate before frosting to avoid moving a soft decorated layer afterward.
Storage
Store mini chocolate cake covered in the refrigerator for up to four days, or the shorter period required by your dairy ingredients. Let an individual slice stand briefly before serving so the buttercream softens. Keep the remainder chilled rather than repeatedly warming the whole cake.
For freezing, wrap unfrosted, fully cooled cake tightly and keep for about a month for best quality. Thaw while wrapped, then add fresh frosting. Protect a frosted cake from being crushed by wrapping it only after the surface is firm.
Adapted from Fiona Dowling’s Mini Chocolate Cake at Just So Tasty; the six-inch pan and recipe-card baking range were checked against that source. See FDA guidance on raw flour and batter safety.
Tips and Variations
A sunken mini chocolate cake may have been underbaked or disturbed before its structure set. Avoid opening the oven repeatedly during the first part of baking. Check the center once the top appears stable, and add a few minutes if the tester still carries wet batter.
If the frosting looks runny, first check whether the butter or cake is too warm. Chill the frosting briefly and stir before adding more sugar. If it is too stiff, use the remaining measured cream gradually instead of adding a large amount at once.
Frequently Asked Questions
What pan should I use?
Mini chocolate cake is sized for a six-inch round pan with sides at least two inches high. A larger pan makes a thinner layer.
Can I frost it while warm?
No. Wait until the top, sides, and base are cool; warm cake melts buttercream and makes it slide.
Why is the sugar amount a range?
The frosting can be softer and less sweet at the lower amount. Add more powdered sugar gradually for a firmer finish.
How many people does it serve?
This mini chocolate cake makes six small slices. Larger dessert portions will reduce the serving count.
Can I double it in the same pan?
Do not double the batter in this six-inch pan. A larger quantity requires an appropriately sized pan and a separate baking schedule.
More Recipes to Try
- Death by Chocolate Mousse
- Chocolate Three Milks Cake
- Simple Vanilla Layer Cake
- Lemon Bars with Shortbread Crust
Mini Chocolate Cake with Chocolate Frosting
Ingredients
For the cake
- 2/3 cup all-purpose flour (84 grams)
- 1/4 cup cocoa powder (22 grams)
- 1/2 teaspoon baking soda
- 1/4 teaspoon baking powder
- 1/8 teaspoon salt (a very small pinch)
- 1/4 cup vegetable oil (or canola oil, 60 ml)
- 2/3 cup granulated sugar (133 grams)
- 1 large egg
- 1/3 cup milk (80 ml, 2% or whole milk is best)
- 1 tablespoon boiling water (15 ml)
For the frosting
- 1/3 cup unsalted butter (softened, 75 grams)
- 1 – 1 1/2 cups powdered sugar (110-165 grams, sifted)
- 3 tablespoons cocoa powder (17 grams, sifted)
- 1/2 teaspoon vanilla extract
- pinch salt
- 2-3 teaspoons whipping cream (10-15 ml, or milk)
Pan Preparation
- cooking spray as needed to grease a 6-inch round pan
Instructions
- Heat the oven to 350°F. Line the bottom of a 6-inch round pan, at least 2 inches deep, with parchment and lightly grease its sides.
- Whisk flour, cocoa, baking soda, baking powder, and salt together. Separately blend oil, sugar, egg, and milk. Combine both bowls, add 1 tablespoon boiling water, and stir until the dry streaks disappear.
- Transfer to the pan and bake around 30–35 minutes. Check that a skewer inserted into the middle has no liquid batter attached.
- Leave in the pan for 15 minutes, unmold onto a rack, and cool completely, allowing about 60 additional minutes or longer as needed.
- Beat frosting butter until creamy. Mix in ½ cup powdered sugar, cocoa, vanilla, and salt on low speed, then gradually increase powdered sugar to 1–1½ cups total. Use 2–3 teaspoons cream as needed for spreadability. Frost the cold cake and slice.
