Start by gathering your ingredients and grabbing your favorite mug. You’ll want a mug that’s large enough to hold the cake as it rises but not too big that it feels lost. Combine ¼ cup of all-purpose flour, 2 ½ tablespoons of granulated sugar, and ¼ teaspoon of baking powder in your mug. Stir them together with a fork until they’re well mixed.
Next, it’s time to add the wet ingredients. Pour in 2 tablespoons of milk and 1 tablespoon of vegetable oil or melted butter. Then, add 2 tablespoons of creamy peanut butter and a dash of vanilla extract. Mix everything until it’s smooth and you no longer see dry flour. Don’t forget to scrape the bottom of the mug to ensure all the ingredients are combined!
Once you have a lovely, smooth batter, gently fold in 1 tablespoon of chocolate chips (or a mini Reese’s pb cup for extra indulgence). This is where the magic happens, as those chocolate pieces will melt slightly during cooking, adding a delightful chocolatey touch.
Now, it’s time to cook! Place your mug in the microwave and cook on high for about 70 to 90 seconds. You’ll want to keep an eye on it as the cake rises. The key indicator that it’s done is when the top of the cake looks set but still has a slightly shiny appearance.
Once cooked, carefully remove your mug from the microwave (it’ll be hot!). Let it rest for about 1 minute to cool slightly before diving in. This is crucial as it helps the cake firm up just a bit more, making for a better texture.
Finally, grab a spoon and dig into your Peanut Butter Mug Cake. You can enjoy it straight from the mug or transfer it to a plate if you’re feeling fancy. The flavors are heavenly, and the warm cake is a dream!
