Peanut Butter Mug Cake
This peanut butter mug cake is my favourite quick microwave dessert recipe!
It’s soft, gooey, and packed with peanut butter and chocolate, all made in just a few minutes. No oven, no mess, just a warm, comforting mug cake straight from the microwave.
Whether it’s a late-night treat or a midday pick-me-up, this microwave dessert is my go-to when I want something quick and delicious.
Trust me, once you try it, you’ll be hooked!
Why This Recipe Is Great
Sometimes you just need a quick and easy dessert that doesn’t require an oven or a bunch of dishes.
This peanut butter cake in a mug is the perfect treat when you’re craving something sweet but don’t want to commit to baking an entire cake.
It’s warm, gooey, and packed with peanut butter and chocolate goodness. Plus, it’s ready in just a few minutes. What’s not to love?
What Inspired This Recipe
I’ve always loved the combination of peanut butter and chocolate, and one day, I was craving something homemade but didn’t feel like doing a full baking session.
I experimented with a few different ratios until I landed on this simple yet delicious mug cake. It’s a little slice of comfort in a cup, perfect for late-night cravings or a cozy afternoon treat.
Ingredients
- ¼ cup all-purpose flour
- 2 tablespoons sugar
- ½ teaspoon vanilla extract
- 1 teaspoon peanut butter
- 1 ½ tablespoons Reese’s or Hershey’s chocolate
- ¼ teaspoon baking powder
- Pinch of salt
- 2 tablespoons butter, melted
- 3 tablespoons milk
Ingredient Breakdown
All-purpose flour – The base of the cake, giving it structure and the perfect texture.
Sugar – Adds just the right amount of sweetness to balance the peanut butter and chocolate.
Vanilla extract – Enhances the flavors and gives the cake a subtle warmth.
Peanut butter – The star of the show, bringing in a creamy, nutty richness.
Reese’s or Hershey’s chocolate – Melts into the cake, creating those gooey, chocolatey pockets that make every bite irresistible.
Baking powder – Helps the cake rise so it’s light and fluffy instead of dense.
Salt – A tiny pinch goes a long way in balancing the sweetness and making the flavors pop.
Butter – Adds moisture and richness for that soft, melt-in-your-mouth texture.
Milk – Helps bind everything together and keeps the cake from being dry.
How to Make It
Making this peanut butter cake in a mug couldn’t be easier. Everything gets mixed right in the mug, so there’s barely any cleanup.
Start by combining the dry ingredients, then mix in the wet ones until you have a smooth batter. A quick trip to the microwave, and in just about a minute, you’ve got a warm, fluffy cake that’s perfect for digging into with a spoon.
Step-by-Step Instructions
- Grab a microwave-safe mug and add the dry ingredients flour, sugar, baking powder, and salt. Stir to combine.
- Pour in the melted butter, milk, and vanilla extract. Mix well until smooth.
- Stir in the peanut butter and chocolate pieces, making sure they’re evenly distributed.
- Microwave on high for about 60–80 seconds, or until the cake has risen and is set in the center.
- Let it cool for a minute before digging in.
- Enjoy!
Quick Tips
Make sure to use a microwave-safe mug that holds at least 12 ounces so the batter has room to rise without spilling over.
If you have a particularly powerful microwave, start with 60 seconds and check to see if it’s done before adding more time. Overcooking can dry out the cake, so it’s better to slightly undercook it than overdo it.
Letting the cake sit for a minute after microwaving is key. It will continue to cook slightly as it cools, which helps it set perfectly.
For an even more indulgent treat, add a scoop of ice cream on top or drizzle some extra peanut butter before digging in. If you want a little crunch, sprinkle chopped nuts or chocolate chips on top before microwaving.
I like to sprinkle some Hershey’s on top.
Ingredient Replacements
If you’re out of all-purpose flour or want a gluten-free option, try almond flour or oat flour, though the texture may be slightly different.
For a lower-sugar version, swap regular sugar for coconut sugar or a sugar substitute like Stevia.
Butter can easily be replaced with melted coconut oil or margarine if you need a dairy-free option. The same goes for milk—any plant-based milk like almond, oat, or soy will work just fine.
If you’re not a fan of Reese’s or Hershey’s chocolate, try using dark chocolate, white chocolate, or even caramel chips for a different twist.
This peanut butter cake in a mug is seriously one of my favorite easy desserts. It’s quick, delicious, and completely customizable.
If you’re making it as a late-night treat or a fun dessert for one, it’s guaranteed to satisfy your sweet tooth. Give it a try and let me know how you like it
Peanut Butter Mug Cake
Ingredients
- ¼ cup all-purpose flour
- 2 tablespoons sugar
- ½ teaspoon vanilla extract
- 1 teaspoon peanut butter
- 1 ½ tablespoons Reese’s or Hershey’s chocolate
- ¼ teaspoon baking powder
- Pinch of salt
- 2 tablespoons butter
- 3 tablespoons milk
Instructions
- In a microwave-safe mug, add the flour, sugar, baking powder, and salt. Stir to combine.
- Pour in the melted butter, milk, and vanilla extract. Mix until smooth.
- Stir in the peanut butter and chocolate pieces, ensuring they are evenly distributed.
- Microwave on high for 60–80 seconds, or until the cake has risen and is set in the center.
- Let it cool for a minute before enjoying.
