When that sweet craving hits and you don’t want to wait, this Peanut Butter Cake in a Mug is your new best friend. It’s soft, warm, and ready in just minutes—and you don’t even need to turn on the oven.
It’s rich, peanut buttery, and totally comforting. I love making this when I want dessert now. One mug, one spoon, and it’s all yours—no sharing required. 😉
What You’ll Need
You only need a few pantry staples to whip up this cozy little treat.
Ingredients:
- 4 tbsp all-purpose flour
- 2 tbsp granulated sugar
- ¼ tsp baking powder
- 1/8 tsp salt
- 2 tbsp creamy peanut butter
- 3 tbsp milk (any kind—dairy or non-dairy)
- ½ tsp vanilla extract
- Optional: a spoonful of extra peanut butter for topping
How to Make This Peanut Butter Mug Cake
This recipe couldn’t be easier. Here’s how to make it:
Step 1: Mix the Dry Ingredients
Grab a microwave-safe mug and stir together the flour, sugar, baking powder, and salt. Make sure it’s well combined—this will help give you a fluffy texture.
Step 2: Add the Wet Ingredients
Now add the peanut butter, milk, and vanilla extract right into the mug. Stir everything until it turns into a smooth batter. Don’t forget to scrape the sides and bottom of the mug so it all mixes in evenly.
Step 3: Microwave the Cake
Microwave on high for 30 to 45 seconds. Start with 30 seconds and check—microwaves vary, and you don’t want to overcook it! The cake should be risen and set in the center. Soft and moist is the goal.
Step 4: Add Toppings (Optional)
While it’s still warm, you can add a spoonful of peanut butter on top. It’ll melt slightly and make the whole thing extra gooey and delicious.
Step 5: Cool and Enjoy
Let your mug cake cool for about a minute (it’s hot!). Then grab a spoon and dig in—this is one cozy, quick dessert you’re going to love.
Can I Use a Different Flour?
Yes! You can sub in gluten-free all-purpose flour or almond flour. Just be aware that some flours absorb more moisture than others, so the texture might vary slightly.
No Creamy Peanut Butter?
Chunky peanut butter totally works if you love a little crunch. Or try almond butter or even Nutella for a fun twist. Just make sure it’s the same thickness so your batter stays balanced.
Want a Vegan Version?
Easy! Use a plant-based milk like oat, almond, or soy. Also, double-check your peanut butter to ensure it’s vegan (most are!). Then enjoy your 100% vegan mug cake.
How Do I Store Leftovers?
This mug cake is best eaten fresh, but if you have some left, cover the mug and store it in the fridge for up to 2 days. To reheat, just microwave for about 10–15 seconds to bring back that soft, warm texture.
One Mug, One Spoon, Instant Dessert
This Peanut Butter Mug Cake is everything a quick dessert should be: easy, comforting, and totally delicious. It’s perfect for those moments when you just need something sweet right now—and bonus points for barely any dishes!
So next time the craving hits, grab your favorite mug and give this recipe a try. It might just become your go-to dessert.
Want more 5-minute desserts? Follow me on Pinterest for more easy recipes that taste like a warm hug in a mug!
