Chocolate Syrup Mug Cake is an individual-sized, microwavable chocolate cake dessert that is made with homemade chocolate syrup and can be enjoyed in just a couple of minutes! For another quick and easy microwavable dessert, try my Chocolate Mug Cake!

Chocolate Syrup Mug Cake

Mug cakes have been around for ages and there is a reason why… they are both quick and easy to make. And, the best part is, you make them in individual servings in the microwave to enjoy whenever you are craving chocolate cake. There is no need to get out all the ingredients to bake an entire cake; you just need some basic ingredients, a microwave-safe mug or ramekin, and a microwave.

If you opt to make this in a coffee mug, it will not fill the cup entirely, which is why I opted for a ramekin to serve mine.

Overhead View of Chocolate Syrup Mug Cake on White Towel with White Spoons

Chocolate Syrup Mug Cake Ingredients

With just a few simple ingredients and five minutes, you can have this treat ready to satisfy your sweet tooth. This recipe has been updated based on reader feedback. So, we did add a little milk and a pinch of salt to the original recipe.

Chocolate Syrup: With chocolate syrup in the name, you know it’s a key part of this recipe. Make your own homemade chocolate syrup to use. Or, you could also get by with Hershey’s syrup.

Raw Ingredients for Chocolate Syrup Mug Cake Shot from Overhead

How to Make a Mug Cake

To make this dessert, get out your favorite large microwave-safe mug or ramekins. Melt the butter in the microwave. Then, mix in the sugar, stirring until combined. Add the remaining ingredients and mix until creamy, or until no lumps are remaining. 

Microwave the mug cake for 60-90 seconds, checking after 60 seconds. The cake is done when there are no gooey spots. Let it rest for about a minute. Finally, top the mug cake with ice cream or homemade whipped cream and more chocolate syrup

Pouring Chocolate Syrup Over a Microwave Mug Cake

How to Make Chocolate Syrup

Get out the following ingredients to make your own chocolate syrup:

  • Cocoa powder
  • Granulated sugar
  • Salt
  • Water
  • Vanilla

Combine the cocoa powder, sugar, salt, and water in a saucepan. Put the saucepan over medium heat. Continue to whisk constantly until the mixture thickens and begins to simmer. Remove from heat after a few minutes (the longer you let it simmer, the thicker it will be) and stir the vanilla into the sauce. Refrigerate until ready to use in this recipe. 

Store any leftovers (which you will have) in the refrigerator for up to a week. Use it up to make your own chocolate milk or use it to drizzle on this Chocolate Cherry Dump Cake.  It’s so easy to make, don’t worry about running out of it! 

Spoonful of Chocolate Mug Cake

Looking for More Quick and Easy Treats?

Two Ingredient Chocolate Mousse

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4.58 from 7 votes

Chocolate Syrup Mug Cake

Prep Time 5 minutes
Cook Time 1 minute
Resting time 1 minute
Total Time 7 minutes
Chocolate Syrup Mug Cake is an individual-sized, microwavable chocolate cake dessert that is made with homemade chocolate syrup and can be enjoyed in just a couple of minutes!

Ingredients

  • 1 tablespoon butter, melted
  • 2 tablespoons granulated sugar
  • ¼ cup (75g) chocolate syrup*
  • ¼ cup (31g) all-purpose flour
  • 2 tablespoons milk
  • ½ teaspoon baking powder
  • 1 pinch kosher salt

Instructions

  • In a large, microwave-safe mug, melt the butter in the microwave. Add sugar and stir until well combined.
  • Add the remaining ingredients and mix until creamy, or no lumps are visible.
  • In one large mug (or two ramekins), microwave for 60-90 seconds, checking at 60 seconds. It is done when there are no more gooey spots. Remove from microwave and let rest for 60 seconds.
  • Serve with ice cream and more chocolate syrup.

Notes

You can use Hershey's Chocolate Syrup if you don't want to make your own! 🙂
This recipe has been updated based on reader feedback.

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Meet Amanda Rettke

Amanda Rettke is the creator of I Am Baker, and the bestselling author of Surprise Inside Cakes: Amazing Cakes for Every Occasion – With a Little Something Extra Inside.Over the course of her 15+ year blogging adventure, she has been featured in and collaborated with the Food Network, New York Times, LA Times, Country Living Magazine, People Magazine, Epicurious, Brides, Romantic Homes, life:beautiful, Publishers Weekly, The Daily Mail, Star Tribune, The Globe and Mail, DailyCandy, YumSugar, The Knot, The Kitchn, and Parade, to name a few.

Reader Comments

  1. Oh my God this was so easy so easy so so easy and the best thing it was fun to make and sooooooooooo good oh my God this will be a Daily dessert for me and the funny thing is I eat in my sleep and I got up last night and made this put my head on the table slept for her she Netflix of course I set the timer in the microwave and when I woke up craving something sweet it was there thank you for this recipe

  2. I didn’t see anywhere in the recipe the amounts of the ingredients for the chocolate syrup for the chocolate syrup mug cake.

  3. I followed this recipe exactly and microwaved it for 3 minutes (60 seconds at a time) and it WOULD NOT set. It was just molten hot liquid

    1. Oh my word… I would think after 3 minutes it would be hard as a rock! I have not ever encountered this specific problem so have no real advice, but I will try to replicate it and see if I can come up with any options. Thank you.

    2. Did you by any chance have any breaks between the 3 minute like even if you didn’t open the microwave did you stop to see??

      Because when I did that once my mug cake didn’t set properly and didn’t rise as much?

  4. It’s ok but 1. It was WAY too sweet, 2. The sugar didn’t dissolve so the cake had a gritty texture that I didn’t like & 3. The mouth feel was kind of oily? I don’t quite know how to describe it but maybe it would’ve improved if I’d let it sit a bit longer. Blitzed it for 60 seconds in a 1200W microwave.

    1. Denise for problem 1 you could probably just lessen the amount of sugar. For problem 2 are you sure you added GRANULATED sugar right after the butter came out of the microwave or did you wait a bit because then if you waited it would be gritty. Also the heat on your microwave was too high so it caused the fats to separate I think but that’s my theory. Maybe try 600 watts next time – that’s what I did and it turned out great.

    1. How is this unclear Sally?
      INGREDIENTS
      1 tablespoon butter, melted
      2 tablespoons granulated sugar
      ¼ cup (75g) chocolate syrup*
      ¼ cup (31g) all-purpose flour
      2 tablespoons milk
      ½ teaspoon baking powder
      1 pinch salt
      INSTRUCTIONS
      In a large, microwave-safe mug, melt the butter in the microwave. Add sugar and stir until well combined.

      Add the remaining ingredients and mix until creamy, or no lumps are visible.

      In one large mug (or two ramekins), microwave for 60-90 seconds, checking at 60 seconds. It is done when there are no more gooey spots. Remove from microwave and let rest for 60 seconds.

      Serve with ice cream and more chocolate syrup.

  5. Want to try this today, but need to know what size ramekins? I have several sizes. Please advise. Do I measure with water first to determine if this will work ? Does it rise much ?? Thanks

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