Gluten-Free Chocolate Mug Cake
Updated
I whip up this gluten-free mug cake whenever I need a quick and satisfying sweet fix. It’s inspired by the classic wacky cake—no eggs, milk, or butter required—yet still delivers a rich, moist, and deeply chocolatey bite. With just a handful of pantry staples, you can create a warm, single-serving dessert in minutes. Best of all, this indulgent treat is naturally dairy-free and vegan, making it perfect for anyone looking for a fuss-free, allergy-friendly option.
This gluten-free chocolate mug cake is my go-to when I want a quick, single-serving dessert without the hassle. It’s rich, moist, and comes together in just a few minutes with simple ingredients. I love making it on solo parent nights or when I’m craving something sweet but don’t want to bake a whole cake. Unlike most mug cakes, this one is based on the Wacky Cake recipe—a clever, egg-free, dairy-free dessert that became popular during World War II when ingredients were scarce. It’s the perfect fuss-free treat that still feels totally indulgent.
You can also try my almond flour chocolate mug cake for a different spin on this delicious and easy treat!
Gluten-Free Chocolate Mug Cake
Ingredients
- 1/4 cup gluten-free all-purpose flour with xanthan gum, I like Pillsbury gluten-free flour. Not all gluten-free flours are created equal. You may experience different baking results depending on the gluten-free flour blend you choose.
- 3 tablespoons granulated sugar
- 1/2 teaspoon gluten-free baking powder
- 1/8 teaspoon salt
- 2 tablespoons gluten-free unsweetened cocoa powder
- 1/8 teaspoon ground cinnamon
- 1/4 teaspoon pure vanilla extract
- 2 tablespoons coconut oil or vegetable oil, I used coconut oil
- 1/4 cup water
- 1 tablespoon gluten-free chocolate chips, For dairy-free and vegan I like Nestle Simply Delicious or Enjoy Life mini chocolate chips.
Instructions
- In a large 12-ounce microwave-safe coffee mug whisk together gluten-free flour, sugar, baking powder, salt, cocoa powder, and cinnamon.
- Whisk in the vegetable oil, vanilla extract, and water until all ingredients are combined and the batter is smooth.
- Sprinkle the top of the batter with the chocolate chips.
- Place a plate or paper towel under your mug the first time you make this cake to catch any potential spillage if your cup is not large enough.
- Microwave mug cake for 70 seconds* on high. Please watch your microwave. I have a 1500 watt microwave oven. Do not overcook or the cake will be dry. I recommend that you place a plate or paper towel under your mug the first time you make this cake to catch any potential spillage if your cup is not large enough.
- Carefully remove from the microwave and enjoy the cake! Let the cake cool for 1 to 2 minutes before eating.
Notes
Nutrition
Nutrition information is automatically calculated, so should only be used as an approximation.
How to Make Gluten-Free Chocolate Mug Cake Step by Step
Mix the Dry Ingredients: Using a large 12 oz microwave-safe mug, whisk together 1/4 cup gluten-free flour, 3 tbsp granulated sugar, 1/2 tsp gluten-free baking powder, 1/8 tsp salt, 2 tbsp gluten-free unsweetened cocoa powder, and 1/8 tsp cinnamon.
Add the Wet Ingredients: Whisk in 2 tbsp vegetable oil, 1/4 tsp vanilla extract, and 1/4 cup water. Mix until all the ingredients are combined and the batter is smooth.
Add Chocolate Chips: Sprinkle 1 tbsp gluten-free chocolate chips on top of the batter.
Cook the Cake: Place the mug in the microwave and cook for 70 seconds on high. Keep an eye on your microwave while the cake cooks. I use a 1500-watt microwave, but yours may vary, so be careful not to overcook, or the cake will turn out dry. The first time you make this, I recommend placing a plate or paper towel under your mug to catch any possible spills in case your cup isn’t big enough. Carefully remove the mug from the microwave and let the cake cool for 1-2 minutes. Serve and enjoy!
Serving Suggestions
I love enjoying this gluten-free mug cake straight from the mug while it’s warm and fudgy, but there are plenty of ways to make it even better! A scoop of keto vanilla ice cream or a dollop of coconut whipped cream adds a creamy contrast to the rich chocolate flavor. If I’m feeling extra indulgent, I drizzle a little peanut butter or melted chocolate on top. Fresh berries like strawberries or raspberries give it a nice fruity balance, and a sprinkle of powdered sugar or cinnamon can add a little extra flair. However I serve it, this mug cake always hits the spot.
Mine tasted like a cup full of vegetable oil! I only had extra virgin olive oil… maybe I could have used melted butter instead ? I also might not have mixed it good enough because I used a fork not a whisk ? ¯\_(ツ)_/¯
Hi Dawn, we recommend vegetable oil in this recipe because it has a more neutral taste.
This is so good, I’ve made it four times in the last week. I’m so excited I can have a delicious mug cake and it’s gf!
This recipe is so quick and easy to make. And, it tastes great – especially when topped with a little vanilla ice cream! Thank you!!!!
Unfortunately, GF chocolate is very expensive in South Africa and this recipe worked perfectly for my chocolate craving…………………………..thank you!
We joined the clean mug club today, thank you Mama!
Currently VERY pregnant and was craving chocolate. I doubled the recipe and made it in a bowl, microwaved for 2 min 30 sec. Added mini chocolate chips instead of regular size. Absolutely perfect, satisfied my craving by halfway through. I’m almost regretting doubling the recipe… almost.
I’m not sure where I went wrong but it’s staying a liquid even after microwaving for 3 minutes in total. I followed the recipe exactly!
Hi Jenna, which flour did you use?
I used 1/8 tsp of xanthan gum since my blend does have and used milk instead of water. worked great tastes so good! fluffy and light
Delicious and easy to make. Great texture. I used 2 tbs sugar which was more than enough for us. This cake is enough for two. Also added about 2 tsp coffee decoction. Thanks, Audrey, all the way from India.
best mug cake I’ve ever had. followed recipe exact. when it was done I did pour over a tablespoon of French vanilla creamer. oh lala.