Mini Chocolate Cake

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There’s so much to love about this ultra-rich mini chocolate cake. A single layer 8-inch moist chocolate cake topped with a silky luxurious chocolate buttercream. It will serve 6 people. Or, 2 people with leftovers. The recipe is quick, easy and perfect for date night or special occasion.

The chocolate buttercream recipe is incredibly rich, creamy, silky, smooth, and easy to work with for decorating cakes

Why this Chocolate Cake works

This isn’t just another chocolate cake — it’s the kind of cake people ask you to make again and again. Here’s why it turns out perfectly every time:

Oil Instead of Butter for Maximum Moisture
Using oil keeps the crumb incredibly soft and tender. Unlike butter, oil stays liquid at room temperature, which means this cake stays moist for days — not just the first few hours after baking.
Hot Liquid to Bloom the Cocoa
Adding hot coffee (or hot water) intensifies the chocolate flavor by “blooming” the cocoa powder. Don’t worry — it won’t make the cake taste like coffee. It simply deepens the richness and gives you that bakery-style chocolate intensity.
The Perfect Balance of Leavening
A combination of baking soda and baking powder ensures a strong, even rise. The cake bakes with a soft, even crumb — no sinking centers or overly domed tops
A Thin Batter = A Moist Cake
The batter will look thinner than typical cake batters — that’s exactly what you want. The extra moisture creates steam in the oven, resulting in a beautifully tender, melt-in-your-mouth texture.
Just the Right Amount of Sugar
This cake is rich and chocolatey without being overly sweet. The sugar enhances the cocoa flavor instead of overpowering it, making it perfect for pairing with almost any buttercream

FAQ – Common Questions and Cake Troubleshooting

Why is my cake dry? Common mistakes include using a dark metal pan and over baking the cake. Using a dark metal pan can cook the edges too fast.
Solution: use a light colored aluminum pan to bake your cake. You can also try fabric-insulated baking strip wrapped around the outside of a cake pan to ensure even baking. Also, be sure to check your cake for doneness at the 25 minute mark. Insert a clean toothpick into the center of the cake, it should come out dry with a few crumbs. If the toothpick is wet, let the cake bake for a few more minutes and test again.
Why did my cake stick to the pan? A cake sticks to the pan primarily due to insufficient greasing, skipping parchment paper, or cooling for too long.
Solution: For the best results, layer the bottom of the pan with parchment paper. Grease the pan with shortening. Dust entirely with cocoa powder.
Why did my cake sink in the middle? A sunken cake center is usually caused by underbaking, opening the oven door too soon, improper leavening amounts (too much baking powder/soda), or using an incorrect oven temperature.
Solution: Don’t open the oven door while the cake is baking. only open it near the end of baking time to check for doneness. Always use the toothpick test to check for doneness. Be sure to measure ingredients properly. Dip a measuring spoon into the container. Scoop up a rounded mound. Scrape off the excess with a flat edge, like a butter knife.
Your buttercream uses salted butter; can I use unsalted butter?
Answer: Yes. If you use unsalted butter for the frosting, you can add a pinch of salt yourself. Do this at the same time as you add the powdered sugar and cocoa powder to the buttercream. I wouldn’t omit salt as salt balances the sugar content and enhances the chocolate flavor.
Should I use dutch-processed or natural cocoa powder?
Answer: You can actually use either or in this recipe. I use dutch-processed.
Can I use a 6 inch round cake pan?
Answer: Yes you can. To accommodate the change in cake pan size, increase the bake time to 30-35 minutes. That’s it.

Storage

Frosted cake: Store in an airtight container or under a cake dome in the refrigerator for up to 4 days. If the room is cool, you can store it covered at room temperature for 1-2 days.

Unfrosted cake: Let the unfrosted chocolate cake cool completely. Then wrap it tightly in plastic wrap to maintain moisture. It can stay at room temperature for up to 2–3 days or in the refrigerator for up to 5 days. For long-term storage (up to 3 months), double-wrap in plastic and freeze.

Frosting: Use frosting immediately or cover tightly and store for up to 1 week in the refrigerator or up to 3 months in the freezer. After freezing, thaw in the refrigerator. Then beat the frosting with a splash of milk on medium speed for a few seconds. This makes it creamy again.