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4.60 from 15 votes

Peanut Butter & Oatmeal Mug Cake for Two

This Peanut Butter & Oatmeal Mug Cake is a simple and fast, sweet and salty fix for dessert or breakfast, it's ready in just 5 minutes!
Prep Time5 mins
Cook Time2 mins
Total Time7 mins
Course: Dessert
Servings: 1 Mug Cake
Calories: 903kcal



  • Whisk milk, vegetable oil, and sugar together in a 12 oz. or large mug.
  • Whisk in the flour until smooth.
  • Whisk in the oatmeal, baking powder, and salt until full incorporated.
  • Spoon 2 tablespoons of peanut butter on top and push slightly into the batter.
  • Microwave on HIGH for 30 seconds, and then in 15-second bursts until the top looks dry and cooked and springs back when pressed with a finger. Mine took about 90 seconds to cook.
  • Top with the remaining tablespoon of peanut butter and let stand at least 5 minutes before eating.



Slightly Adapted from The Kitchn.
Throw a small handful of mini chocolate chips into the batter for extra fun!


Calories: 903kcal | Carbohydrates: 85g | Protein: 22g | Fat: 56g | Saturated Fat: 29g | Cholesterol: 9mg | Sodium: 843mg | Potassium: 744mg | Fiber: 5g | Sugar: 33g | Vitamin A: 145IU | Calcium: 209mg | Iron: 3.8mg