Fudgy 1-minute brownie mug cake

Why you’ll love this recipe

I love how incredibly fast this recipe is. In just about a minute, I can enjoy a freshly made dessert without turning on the oven.

I also enjoy the texture of this mug cake. It turns out soft, fudgy, and slightly gooey in the center, which makes it feel like a real brownie.

Another reason I keep making this is that it uses simple ingredients I usually already have at home, so I can satisfy a chocolate craving anytime.

Ingredients

(Here’s a tip: Check out the full list of ingredients and measurements in the recipe card below.)

• 1 tbsp salted butter (or unsalted butter with a pinch of salt)
• 2 tbsp semi sweet chocolate chips
• 1 egg yolk
• 1 tbsp brown sugar + 1 teaspoon brown sugar
• 1/8 tsp vanilla (optional)
• 2 tbsp flour
• 1 tbsp chocolate chips (optional)

Directions

I start by melting the butter directly in a mug using the microwave. Then I add the chocolate chips and stir until they melt completely. If needed, I microwave the mixture a little longer to make sure everything is smooth.

Next, I add the egg yolk, brown sugar, and vanilla if I am using it. I stir everything together until well combined. Then I mix in the flour and stir just until it disappears into the batter.

At this point, I sometimes add extra chocolate chips for more richness and gently stir them in.

I microwave the mug on high for about 45 seconds. Depending on the microwave, I may add another 10 to 15 seconds until the brownie is set but still soft in the center.

Servings and timing

I get 1 serving from this recipe.

The total time is about 1 minute. I usually spend a few seconds preparing the ingredients and about 45 to 60 seconds cooking.

Variations

I sometimes switch the chocolate chips for dark chocolate to create a richer flavor. It makes the brownie taste more intense and less sweet.

For a different twist, I add a spoonful of peanut butter or hazelnut spread in the center before cooking. It creates a soft, melted filling inside.

I also like adding a pinch of espresso powder occasionally to enhance the chocolate flavor without making it taste like coffee.

Storage/reheating

I usually eat this mug cake right away while it is warm and fudgy. Since it is a single serving, I rarely have leftovers.

If I do need to store it, I keep it covered at room temperature for a short time. To reheat, I warm it in the microwave for a few seconds to bring back the soft texture.

FAQs

Can I use a whole egg instead of just the yolk?

I prefer using only the yolk because it keeps the texture rich and fudgy. Using a whole egg can make the brownie more cake-like.

Why is my mug cake dry?

It can become dry if I overcook it. I always start with less time and add a few extra seconds only if needed.

Can I make this without chocolate chips?

I can, but the chocolate chips give the brownie its rich flavor and texture. Without them, it will be less fudgy.

What size mug should I use?

I use a standard microwave-safe mug that has enough space for the batter to rise slightly without overflowing.

Can I make this gluten free?

I can substitute the flour with a gluten-free alternative that works as a 1:1 replacement, and it still turns out great.

Conclusion

This fudgy 1-minute brownie mug cake is one of my favorite quick desserts when I need something warm, rich, and satisfying. I love how simple it is to prepare and how it delivers a perfect chocolate treat in just minutes.