This chocolate lava mug cake is a warm dessert for one, mixed and cooked in the same mug. Cocoa flavors the cake, while pieces of dark chocolate melt in the middle. It takes about four minutes from mixing to serving, with no oven or full-sized cake to prepare.
Why You'll Love This Chocolate Lava Mug Cake
- A small batch: The recipe makes one serving, so there is no full cake to portion or store.
- Little washing up: A mug and a fork or small whisk are all you need for mixing.
- No separate filling to prepare: Chocolate squares go straight into the batter and melt as the cake cooks.
There were evenings growing up when dessert was something small, warm, and ready quickly. This mug cake brings back that uncomplicated feeling, much like a cup of Spanish hot chocolate. If you need a version without egg, my chocolate mug cake uses a separate eggless recipe.
The important detail here is where the chocolate goes: keep the squares together just below the surface rather than stirring them through the batter. This gives the cake a concentrated melted center, with cooked cake around it. For a larger chocolate bake, you can also try my fudgy chocolate brownies or easy chocolate muffins.
Key Ingredients For Chocolate Lava Mug Cake
These ingredients create a soft microwave cake with a distinct melted center.
- All-purpose flour and unsweetened cocoa powder: Flour gives the cake its structure, while cocoa carries the chocolate flavor through the batter. Using unsweetened cocoa keeps the sweetness controlled by the sugar in the recipe.
- Sugar, baking powder, and kosher salt: Sugar balances the cocoa's bitterness, baking powder helps the batter rise, and salt brings the flavors together.
- Whole milk, vegetable oil, egg, and vanilla: Milk loosens the batter, oil keeps the crumb moist, and the egg helps the cake set. Vanilla rounds out the chocolate flavor. Start with the milk and egg at room temperature, as used in this recipe.
- Dark chocolate: Squares broken from a bar form the melted center. Keep them grouped in the middle so the filling stays concentrated rather than becoming scattered pieces throughout the cake.
How to Make Chocolate Lava Mug Cake
You can find the complete printable recipe with measurements in the recipe card below.
1. Mix the dry ingredients: Whisk the sugar, flour, salt, baking powder, and cocoa powder together in a large microwave-safe mug.
2. Add the wet ingredients: Pour in the milk and oil, then add the egg and vanilla. Whisk until smooth, making sure no dry ingredients remain at the bottom.
3. Add the chocolate: Place the chocolate squares together in the middle and press them just below the batter's surface.
4. Microwave and rest: Microwave on high until the cake surrounding the chocolate is set with no wet batter. Let it rest briefly, then eat it warm while the center is melted.
Tips for Chocolate Lava Mug Cake
- Reach the bottom: Dry flour can collect where the base meets the sides of the mug. Run the fork or whisk around that edge before adding the chocolate.
- Check before extending the cooking time: Begin checking at 75 seconds. Microwave power varies, so use the appearance of the surrounding cake along with the timer.
- Serve after the brief rest: Have your spoon and any topping ready. The melted center is the reason to enjoy this cake warm rather than leave it to cool completely.
What to Serve with Chocolate Lava Mug Cake
A small scoop of no-churn chocolate ice cream adds a cold contrast to the warm cake. For a dessert plate to share, chocolate-covered strawberries can go alongside it. The cake is also ready to eat straight from the mug without any toppings.
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Recipe
Chocolate Lava Mug Cake
Ingredients
- 3 tablespoons granulated sugar
- 30 g all-purpose flour
- ¼ teaspoon kosher salt
- ¼ teaspoon baking powder
- 2 tablespoons unsweetened cocoa powder
- 3 tablespoons whole milk - at room temperature
- 3 tablespoons vegetable oil
- 1 large egg - at room temperature
- ½ teaspoon vanilla extract
- 4 squares of dark chocolate - broken from a bar
Instructions
- In a large microwave-safe mug, whisk together 3 tablespoons granulated sugar, 30 g all-purpose flour, ¼ teaspoon kosher salt, ¼ teaspoon baking powder, and 2 tablespoons unsweetened cocoa powder until evenly combined.
- Add 3 tablespoons whole milk, 3 tablespoons vegetable oil, 1 large egg, and ½ teaspoon vanilla extract. Whisk until completely smooth, with no dry pockets remaining at the bottom.
- Press 4 squares of dark chocolate into the center of the batter. Keep them together and push them just below the surface.
- Microwave on high for 75-90 seconds, checking at 75 seconds. The cake surrounding the chocolate should be set with no wet batter; the chocolate in the middle should remain melted. If the surrounding cake is still wet, continue microwaving briefly and check again rather than relying on the timer alone.
- Let the mug cake rest for 30-45 seconds, then serve it warm from the mug.
Notes
Nutrition
Nutritional information is based on third-party calculations and should be considered an estimate only. Actual nutritional content will vary based upon brands used, measuring methods, cooking method, portion sizes, and more.
Susana says
I had to try this after seeing it everywhere, and I’m honestly impressed. It came together so fast, and the texture was soft and rich. I’ll definitely play around with the microwave time next round, but for a quick chocolate fix, this totally hits the spot.