5 steps, about 6 minutes start to finish.
Mix Dry Ingredients: In a microwave-safe mug, whisk together flour, sugar, cocoa powder, baking powder, and salt.
Add Wet Ingredients: Stir in milk, oil, vanilla extract, and peanut butter until the batter is smooth.
Fold in chocolate chips if using.
Microwave: Microwave for 45–60 seconds (start checking at 45 seconds to prevent overcooking).
Top & Serve: Drizzle with extra peanut butter, add more chocolate chips, or top with whipped cream or ice cream for extra indulgence!
“Start checking at 45 seconds and stop the moment the top is set. A mug cake goes from moist to rubbery in about ten extra seconds in the microwave.”
