How to Make a 6-Inch Chocolate Cake with Ganache Using Cake Mix

A 6-inch chocolate cake is a practical size when you want a small, neat layer cake without a lot of leftovers. Using cake mix keeps the ingredient list short, but you still get a tender crumb and a reliable rise when you measure carefully and avoid overmixing.

This recipe makes one 6-inch round cake, about 2 inches tall. You can serve it as a simple single-layer cake or slice it in half for a thin two-layer cake.

6-Inch Chocolate Cake and Ganache Ingredients

Ingredient	U.S. Measure	Metric
Chocolate cake mix (dry)	1 cup	120 g
Large egg	1	1
Vegetable oil	1/4 cup	60 ml
Milk	1/4 cup	60 ml
Chocolate chips (for ganache)	1/2 cup	90 g
Heavy cream (for ganache)	1/4 cup	60 ml

Equipment You Need for a 6-Inch Cake

A few basic tools make the process smoother.

A 6-inch round cake pan (about 2 inches deep), mixing bowl, whisk or sturdy spoon, measuring cup, parchment paper, cooling rack, and a small heatproof bowl for the ganache.

How to Prepare a 6-Inch Cake Pan So It Releases Cleanly

Heat the oven to 350°F (180°C).

Grease the bottom and sides of the 6-inch pan. Cut a circle of parchment paper to fit the bottom, press it into the pan, then grease the parchment lightly. This small step helps prevent sticking, especially with chocolate cake.

How to Make the Chocolate Cake Batter From Cake Mix

Add the cake mix, egg, oil, and milk to a mixing bowl. Stir until you no longer see dry pockets of mix.

Stop once the batter looks smooth and evenly combined. Overmixing can make a small cake bake up tougher than it needs to.

How Long to Bake a 6-Inch Chocolate Cake

Scrape the batter into the prepared pan and smooth the top.

Bake for 22 to 30 minutes. Start checking early, since ovens and pan depth vary.

The cake is done when the center springs back lightly when touched and a toothpick inserted in the middle comes out clean or with a few moist crumbs. If you use an instant-read thermometer, aim for about 200°F to 205°F (93°C to 96°C) in the center.

Let the cake cool in the pan for 10 minutes, then turn it out onto a rack. Peel off the parchment and let the cake cool completely before adding ganache. If the cake is warm, the ganache will slide and soak in unevenly.

How to Make Chocolate Ganache for a Small Cake

Put the chocolate chips in a heatproof bowl.

Warm the cream until it is steaming and very hot, but not boiling. You can do this in a small saucepan over low heat or in the microwave in short bursts.

Pour the hot cream over the chocolate chips. Let it sit for 2 minutes, then stir slowly from the center outward until glossy and smooth.

If you still see small unmelted bits, warm the mixture gently in 10 to 15 second microwave bursts, stirring between each, until smooth.

How to Frost a 6-Inch Cake With Ganache

For a simple glaze finish, let the ganache cool for 5 to 10 minutes so it thickens slightly, then pour it over the center of the cake and nudge it toward the edges with a spoon.

For a thicker, spreadable frosting, let the ganache cool longer at room temperature, stirring every few minutes, until it holds soft swirls. Spread it over the top and sides with a spoon or spatula.

If you want a clean slice, chill the frosted cake for 20 to 30 minutes before cutting.

Common Questions About 6-Inch Chocolate Cake With Ganache

Can I bake this in two 6-inch pans for layers?

This batter is sized for one 6-inch pan. If you split it into two pans, the layers will be very thin and will bake faster. For two thicker layers, double the recipe and divide evenly between two pans.

What if my cake sinks in the middle?

The most common reasons are underbaking, opening the oven door too early, or overmixing. Make sure the center tests done and the cake has set before removing it from the oven.

What if my ganache is too thin or too thick?

If it is too thin, let it cool longer, stirring occasionally. Cooling thickens ganache.

If it is too thick, warm it gently in short bursts and stir well. Add 1 to 2 teaspoons of warm cream only if needed, since a little liquid changes the texture quickly.

Can I make this cake ahead of time?

Yes. Bake the cake, cool it fully, wrap it tightly, and keep it at room temperature for up to 1 day. Frost with ganache the day you plan to serve for the freshest texture.

How do I store leftover cake?

Cover and refrigerate for up to 4 days. For the best texture, let slices sit at room temperature for about 20 to 30 minutes before eating so the ganache softens slightly.

Can I freeze a 6-inch chocolate cake with ganache?

You can freeze the unfrosted cake more easily. Wrap it tightly in plastic wrap, then foil, and freeze for up to 2 months. Thaw, still wrapped, at room temperature, then add fresh ganache.

You can also freeze frosted cake, but the ganache may look slightly dull after thawing. Chill the cake until firm, wrap well, and thaw in the refrigerator overnight.