One-Bowl Chocolate Banana Mug Cake

By AislePrompt Test Kitchen · Reviewed by AislePrompt Editorial · ·

A quick, single-serving chocolate cake made in a mug with ripe banana and cocoa powder, perfect for an instant warm treat. This american-inspired desserts ready in about 7 minutes layers small (about 100g) ripe banana, unsweetened cocoa powder, all-purpose flour into a dessert worth slowing down for — great for weekend baking, holiday tables, or any time you want a sweet payoff at the end of a meal. Each serving lands at about 280 calories and feeds 1, so it slots into a weekend bake or a special-occasion dessert tray. Tap "Plan a meal with the AI" below to drop this recipe into your week and send the ingredients straight to Instacart. Nutrition values are approximate, calculated from USDA FoodData Central (fdc.nal.usda.gov) — verify against ingredient labels for any health-driven dietary plan.

Prep: 5 min Cook: 2 min Serves 1 American cuisine 280 cal/serving
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Ingredients

Instructions

  1. Step 1: In a large microwave-safe mug, mash 1 small ripe banana with a fork until smooth, about 1 minute.
  2. Step 2: Add 2 tablespoons unsweetened cocoa powder, 3 tablespoons all-purpose flour, 2 tablespoons granulated sugar, 1/4 teaspoon baking powder, and a pinch of salt to the mug and stir well to combine.
  3. Step 3: Pour in 3 tablespoons milk, 1 tablespoon vegetable oil, and 1/4 teaspoon vanilla extract, mixing thoroughly until you have a smooth batter with no lumps.
  4. Step 4: Microwave the mug on high for 90 seconds, then check doneness by inserting a toothpick; if it comes out clean, the cake is done. If not, microwave in additional 10-second intervals until cooked through but moist.
  5. Step 5: Let the mug cake cool for 2 minutes, then enjoy directly from the mug or tip onto a plate to serve.

Equipment for this recipe

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Frequently asked questions

How long does One-Bowl Chocolate Banana Mug Cake take to make?

Total time is about 7 minutes (5 min prep + 2 min cook). Most home bakers find this fits a weekend afternoon; chill or store as the recipe directs before serving.

How do I store leftover One-Bowl Chocolate Banana Mug Cake?

Cool fully before storing. Most baked desserts keep at room temperature in an airtight container for 2–3 days, or in the fridge for up to 5 days. Cream- or custard-based desserts must go in the fridge within 2 hours; reheat gently or serve cold per the recipe.

Can I substitute ingredients in One-Bowl Chocolate Banana Mug Cake?

Yes — most ingredients in this recipe have flexible swaps. For oil, use any neutral high-smoke-point oil (avocado, grapeseed, refined coconut). For aromatics, dried herbs at ⅓ the volume of fresh work in a pinch. The full ingredient list is shoppable on Instacart so you can see substitutes in real time.

How do I scale One-Bowl Chocolate Banana Mug Cake for a different number of people?

The recipe is written for 1 servings. Multiply each ingredient by (your serving target / 1). Cook time stays roughly the same up to 2x; for 3-4x batches, switch from a skillet to a sheet pan or stockpot so the food isn't crowded — overcrowding steams instead of browns.

What goes well with One-Bowl Chocolate Banana Mug Cake?

American desserts like this pair well with a simple grain (rice, couscous, or crusty bread), a quick salad with acid (lemon vinaigrette, pickled onions), and a pan sauce or yogurt-based dip. Tap "Plan a meal with the AI" to get specific side suggestions.