Kirbie's Cravings

Guinness Stout Chocolate Mug Cake

close-up photo of a Guinness Stout Chocolate Mug Cake

St. Patrick’s Day is just a few days away so I wanted to share another St. Patty’s themed recipe.

I posted a Guinness Chocolate Mug Cake last year made in adorable mini beer glasses, but I’ve since tweaked the recipe, and I wanted to share this new and improved version. It’s got a simpler list of ingredients, it’s eggless, and it has a better texture too.

I love the pairing of chocolate and stout beer. The stout brings out the bitter notes in the chocolate, giving it a coffee-like flavor.

Guinness Stout Chocolate Mug Cake

Since I was working with Guinness beer, I decided to cook the cake it in a giant beer mug. I ended up doubling the recipe to fill the mug, though it didn’t quite reach the surface. Of course the problem of doubling the recipe is that I ended up eating the whole thing… Damn my lack of self-control when it comes to chocolate.

overhead photo of Guinness Stout Chocolate Mug Cake

The chocolate cake isn’t too sweet because I really wanted the stout flavor to come through. You can add a little more sugar if you want something sweeter.

close-up photo of Guinness Stout Chocolate Mug Cake

Guinness Stout Chocolate Mug Cake

Servings: 1
Prep Time: 4 minutes
Cook Time: 1 minute
Total Time: 5 minutes
Course: Dessert
Cuisine: American
This easy mug cake takes just minutes to make in the microwave!


  • 3 tbsp all purpose flour
  • 1/4 tsp baking powder
  • 1 tbsp white granulated sugar if you desire a sweeter cake, you may want to add another 1 tsp
  • 2 1/2 tbsp fat free milk
  • 1/2 tbsp vegetable oil
  • 1 tbsp unsweetened cocoa powder
  • 1 tbsp Guinness stout beer


  • Combine all ingredients into an oversized microwave-safe mug. Mix with a small whisk until batter is smooth. Cook in microwave for about 1 minute. Let cake cool a few minutes before eating.

The nutrition information provided are only estimates based on an online nutritional calculator. I am not a certified nutritionist. Please consult a professional nutritionist or doctor for accurate information and any dietary restrictions and concerns you may have.

Did you make this recipe?I'd love to see it! Mention @KirbieCravings and tag #kirbiecravings!

Subscribe to receive new post updates via email

don’t miss a thing!

Get new post updates via email:

Leave a Reply

Your email address will not be published. Required fields are marked *

Recipe Rating

4 comments on “Guinness Stout Chocolate Mug Cake”

  1. Holy Smokes – yum!!
    Would look really good with some Baileys/Cream concoction on top to represent the actual stout.

  2. I will be making this mug cake this weekend! Now all I need is some Guinness!!!

    • I hope you like it! It’s not too sweet because I realized when I made it sweeter you couldn’t taste the guinness at all. And if you try to add too much guinness the batter gets gummy. But I thought this was a good compromise. Chocolaty with a little bit of the bitter stout finish.