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    Broken Oven Baking » Recipes » Chocolate

    Fudgy Mug Brownie

    Published: Aug 2, 2021 · Modified: Dec 30, 2021 by Kayla Burton · This post may contain affiliate links · 10 Comments

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    Are you ever just craving brownies but don't feel like making a whole pan of them? That's how I've been feeling a lot lately, so I decided to make this Fudgy Mug Brownie! It's a single serving fudgy brownie made in a coffee mug that's sure to fulfill your chocolate craving! No oven is required and it'll be ready in less than 10 minutes!

    A hand holding a mug filled with a fudgy brownie

    What You Need to Make This Recipe

    Ingredients:

    • Chocolate: you can use semi-sweet or dark chocolate, chips or chunks.
    • Unsalted butter: this will be melted with the chocolate in the first step.
    • Granulated & light brown sugars: if you want to just use one over the other, that's fine, just make sure it's adding up to ¼ cup.
    • Egg white: this is going to help give that fudgy texture!
    • Flour, cocoa powder, salt: the dry ingredients that provide structure and flavor for the brownie.

    Equipment:

    • 11-12 ounce mug: you don't need any mixing bowls or anything, everything will go straight into the mug! I used the Instagram famous mug from Target!
    • Fork: this is all you'll need to mix the ingredients together!
    Mug brownie ingredients laid out and labeled

    Recipe Notes

    This is the easiest, quickest and tastiest brownie recipe you'll ever try! It's like a mug cake except better because it's gooey & fudgy! If you want a full brownie recipe, I recommend my Samoa Brownies!

    The first step is to heat the chocolate with the butter in the microwave. When the butter is melted and the chocolate is soft, take it out and stir it until the chocolate melts completely. Then you're going to stir in the sugars, followed by the egg white. Mix these in real well until the batter is slightly thick. Finally, stir in the remaining dry ingredients and then microwave it for about 30 seconds at half power. The brownie should come out looking gooey and bubbly on top.

    Microwave times will vary as microwaves are pretty inconsistent. If you scoop out a bite and it's too gooey, put it back in the microwave for a few more seconds. If it's too cakey, it was probably heated too long or at too high of a power.

    Tips & Storage

    Can I add extra chocolate chips or other fixings in the brownie?

    Sure! You can gently mix them in after adding the flour mixture.

    Why is my mug brownie so cakey?

    If it comes out more like a cake than a fudgy brownie, it was probably overheated. Try reducing your microwave's power or the heating time.

    What should I top it with?

    It's chocolatey and delicious on its own, but it's also super tasty topped with a scoop of ice cream, peanut butter, caramel sauce, or whatever your favorite brownie toppings are!

    Can I make this gluten free?

    I haven't tested this with gluten free flour, but I am guessing that it would work just as well. Please let me know if you try it this way!

    How long is this good for?

    I recommend eating it all right away, but it can be stored at room temperature for 1-2 days. It'll be very hot out of the microwave so be careful not to burn your mouth!

    A fudgy mug brownie on a plate with a spoonful of brownie next to it

    More Brownie Recipes:

    • Mini Peanut Butter Cup Brownies
    • Edible Brownie Batter
    • Mini Brownie Bites
    • Samoa Brownies

    Did you try this recipe?
    Tag @brokenovenbaking on Instagram and leave a star review below!

    Fudgy Mug Brownie

    Kayla Burton
    This single serve Fudgy Mug Brownie whips up in the microwave in less than 10 minutes! It's sure to fulfill any urgent chocolate cravings!
    4.80 from 10 votes
    Print Recipe Pin Recipe Save for LaterSaved!
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    Prep Time 5 mins
    Cook Time 1 min
    Total Time 6 mins
    Course Dessert
    Cuisine American
    Servings 1 mug brownie
    Calories 722 kcal

    Equipment

    • (1) 11-12 ounce mug
    • Fork
    • Measuring spoons
    • Scale or measuring cups

    Ingredients
     
     

    • ¼ cup semi-sweet or dark chocolate chips/chunks
    • 2 tablespoons unsalted butter
    • 2 tablespoons granulated sugar*
    • 2 tablespoons light brown sugar packed
    • 1 large egg white (~30g) room temperature
    • 2 tablespoons all-purpose flour
    • 2 teaspoons cocoa powder
    • 1 tiny pinch salt

    Instructions
     

    • Melt the chocolate and butter in an 11-12 ounce mug (~40 seconds, stir every 20 seconds) just until the chocolate is almost melted. Stir the melted butter and mostly melted chocolate until it's smooth and completely melted.
    • Mix in the sugars and then the egg white (make sure the mixture has cooled before adding the egg white so that it does not turn into scrambled eggs). Stir with a fork until the mixture is slightly thick (1-2 minutes).
    • Add the flour, baking cocoa and salt. Gently stir with the fork until no flour streaks remain.
    • Microwave the mixture on 50% power for 30-40 seconds. Enjoy!*

    Video

    Notes

    *If you prefer less sweetness, feel free to omit the granulated sugar.
    *The brownie will be hot out of the microwave, so be careful not to burn your mouth! (I learned this the hard way)
    Microwave times may vary. If the brownie is too gooey, heat it for a few more seconds. If it's too cakey, it was likely heated for too long or at too high of a power.
    If there happens to be leftovers, cover the mug and store at room temperature for 1-2 days.
    The provided nutrition information is an estimate, the calorie accuracy is not guaranteed.

    Nutrition

    Calories: 722kcalCarbohydrates: 84gProtein: 9gFat: 40gSaturated Fat: 24gPolyunsaturated Fat: 1gMonounsaturated Fat: 11gTrans Fat: 1gCholesterol: 63mgSodium: 458mgPotassium: 395mgFiber: 5gSugar: 64gVitamin A: 722IUCalcium: 62mgIron: 4mg
    Tried this recipe?Let us know how it was!

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    Reader Interactions

    Comments

    1. Kirstin says

      February 07, 2023 at 6:54 pm

      5 stars
      I absolutely adore this recipe. I wouldn’t consider myself a chocoholic. However, once in a while I have a very persistent craving. I found this recipe and decided to give it a whirl. Oh my GOODNESS it was divine! I’ve made it a handful of times since and it has never failed. A huge hit with the kids and husband as well. Thank you!

      Reply
      • Kayla Burton says

        February 13, 2023 at 7:27 am

        Aw thank you for sharing, Kirstin!! I'm so happy to hear this!

        Reply
    2. Kathy says

      February 18, 2022 at 8:06 pm

      5 stars
      I enjoyed this so much, I will be making them more often. Especially on these really cold nights.

      Reply
    3. Kathy says

      February 08, 2022 at 6:44 pm

      5 stars
      Kayla, I really liked the brownie and so easy to make in a cup. Thank you for sharing. I think I’ll have another tomorrow.

      Reply
      • Kayla says

        February 13, 2022 at 8:35 am

        I'm happy to hear that you enjoyed it!

        Reply
    4. Chris says

      September 05, 2021 at 9:23 pm

      5 stars
      Love the flavor and texture of this! I had this during the middle of a busy work day (thankful for work from home) and it instantly eased my stress. Delicious flavor, will be eating again.

      Reply
    5. Kara P says

      August 25, 2021 at 12:32 pm

      3 stars
      One note to this recipe - you need to let the chocolate/butter cool before you add the egg white or you'll have cooked eggs in your brownie. Yuck..

      Also, you don't need as much sugar as the recipe calls for to make this a little less horribly unhealthy.

      Reply
      • Kayla says

        August 25, 2021 at 3:24 pm

        Hi Kara, I appreciate your feedback and I'm sorry this recipe was not a success for you! The chocolate & butter should only be heated to the point where they melt and stirring in the sugars helps cool it down, but I understand your comment and will update the recipe to clarify this step. As a dessert blog, my main focus is not healthy recipes and sweetness is a personal preference but I'll also add a note about decreasing the amount of sugar. Thank you!

        Reply
    6. Sheila Pinto says

      August 03, 2021 at 7:05 am

      What is 50% of microwave power?

      Reply
      • Kayla says

        August 03, 2021 at 7:20 am

        This is changing the microwave Power Level setting to one half. Usually you can change it by entering the cook time and then hitting "Power" and then "5", but it varies by microwave.

        Reply

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    About Kayla

    Hey, I'm Kayla! I'm a self-taught baker, recipe developer & food photographer in Chicago! This blog is a way for me to share recipes, tips, and everything I love related to baking & photography. If you have any questions or want to connect, I'd love to hear from you!
    About Kayla →

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