Microwaved Peanut Butter Mug Cake
A single-serving mug cake with rich peanut butter flavor, made quickly in the microwave for an instant sweet fix. This American-inspired recipe, ready in about 7 minutes, layers all-purpose flour, granulated sugar, baking powder 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 320 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.
Ingredients
- 4 tbsp all-purpose flour
- 2 tbsp granulated sugar
- 1/4 tsp baking powder
- 3 tbsp milk
- 2 tbsp peanut butter
- 1/4 tsp vanilla extract
- 1 tbsp vegetable oil
- 1 tbsp mini chocolate chips
The bakeware we’d bake this in → Best Bakeware Sets in 2026: Top Picks + Buying Guide
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Equipment for this recipe
Tools this recipe's steps call for, with a link to each on Amazon.
Instructions
- Step 1: In a microwave-safe mug, whisk together 4 tbsp all-purpose flour, 2 tbsp granulated sugar, and 1/4 tsp baking powder until evenly mixed.
- Step 2: Add 3 tbsp milk, 2 tbsp peanut butter, 1/4 tsp vanilla extract, and 1 tbsp vegetable oil. Stir briskly until a smooth batter forms with no lumps.
- Step 3: Fold in 1 tbsp mini chocolate chips for bursts of chocolate.
- Step 4: Microwave on high for 90 seconds, watching carefully to avoid overflow, until the cake has risen and is set but still moist.
- Step 5: Let the mug cake cool for 2 minutes before enjoying directly from the mug.
