Mug Brownie Chocolate Cake

Featured in: Sweet Messy Treats

This quick mug brownie blends cocoa, flour, and sugar with milk and oil to create a smooth batter. Microwave for under a minute to achieve a moist, fudgy texture that's perfect for satisfying chocolate cravings fast. Optional chocolate chips or nuts add extra flavor and texture. Let it cool briefly, then enjoy straight from the mug for a warm, comforting dessert fix.

Updated on Mon, 22 Dec 2025 09:41:00 GMT
Warm, decadent mug brownie is served in its mug, ready for a quick and easy dessert. Save to Pinterest
Warm, decadent mug brownie is served in its mug, ready for a quick and easy dessert. | messlitreats.com

Late one night, scrolling through my phone while the kitchen was finally quiet, I stumbled onto the idea of a brownie that took less time than heating up the oven. I was skeptical, honestly—how could two minutes in a microwave compete with the real thing? But curiosity got the better of me, and I grabbed a mug from the cabinet. What came out shocked me: dense, fudgy, still-warm chocolate cake that tasted nothing like the microwave disasters I'd imagined.

I made this for my roommate one morning after she complained that everything worth eating took forever. She watched me mix it in a mug like I'd lost my mind, then stared at the microwave for 60 seconds. When she tasted it warm from the mug with a spoon, her eyes got wide. She made four more that week.

Ingredients

  • All-purpose flour: The structure holder—4 tablespoons gives you enough body without making it cakey.
  • Granulated sugar: 4 tablespoons creates that sweet edge, but don't add more or the texture gets gritty.
  • Unsweetened cocoa powder: The real star here—2 tablespoons of good cocoa turns this from okay to memorable.
  • Salt: Just a pinch, but it makes the chocolate sing instead of feeling flat.
  • Vegetable oil: 2 tablespoons keeps everything moist and tender; butter works too if you want a richer flavor.
  • Milk: 3 tablespoons creates the smooth batter—don't skimp or it gets thick and clumpy.
  • Vanilla extract: A quarter teaspoon adds depth without overpowering the chocolate.
  • Chocolate chips: Optional but recommended if you like little pockets of melted chocolate throughout.
  • Chopped nuts: Optional, adds a nice contrast if you're into texture.

Instructions

Combine the dry stuff:
Grab a mug that's at least 12 ounces—you need the room for rising. Add flour, sugar, cocoa powder, and salt, then mix with a fork until no streaks of cocoa remain. This takes about 30 seconds and you'll feel the satisfaction of breaking up every lump.
Make it wet and smooth:
Pour in the oil, milk, and vanilla, then stir with the fork until you have a thick, smooth batter with no dry flour hiding in the corners. The batter should look almost like brownie batter already, which is when you know you're on track.
Optional boosts:
If you want chocolate chips or nuts, fold them in gently with a couple of fork strokes. Don't overwork it—these little additions are surprises, not the main event.
Microwave into magic:
Heat on high for 50 to 70 seconds, watching through the window if your microwave has one. The brownie will rise up and the top will look just barely set, like it's still got a secret softness underneath. Every microwave is different, so start at 50 seconds and add time if needed rather than burning it.
Cool for one perfect minute:
Let it sit in the mug so the edges set a tiny bit more while the center stays fudgy. This is when you get a spoon ready.
A perfectly textured 2-minute mug brownie, oozing with rich chocolate, looks so delicious! Save to Pinterest
A perfectly textured 2-minute mug brownie, oozing with rich chocolate, looks so delicious! | messlitreats.com

There's something about eating dessert warm from a mug with a spoon, alone or with someone you trust, that feels less like indulgence and more like self-care. It's become my ritual on nights when I need something small but real.

When to Make This

This isn't a showstopper dessert for a dinner party, but it's perfect for the moments when you actually need chocolate and you need it now. Late-night cravings, afternoons when you're tired, or when someone stops by and you want to offer them something homemade without turning your kitchen into a baking marathon. It's a personal dessert, something you make for yourself or one other person.

Smart Swaps and Variations

Once you make this a few times, you'll start playing with it. Coconut oil gives it a lighter taste, melted butter makes it richer. Almond milk works if you're avoiding dairy, and oat milk adds a subtle sweetness. Some people add a tiny splash of coffee to deepen the chocolate flavor, or a sprinkle of sea salt on top before microwaving. The formula is forgiving enough that you can experiment.

Toppings and Serving Ideas

Eat it straight from the mug if you're feeling casual, or transfer it to a small bowl if you want to pretend you have your life together. A scoop of vanilla ice cream melts into the warm brownie and turns it into something almost luxurious. A drizzle of chocolate sauce, a dollop of whipped cream, or even a sprinkle of powdered sugar takes it from quick fix to moment worth savoring.

  • Ice cream is the classic move—let it melt into the warm brownie and don't overthink it.
  • Chocolate sauce adds richness if your cocoa powder didn't hit as dark as you wanted.
  • A pinch of sea salt on top before serving brings everything into focus.
Enjoy the fudgy, single-serving mug brownie, ideal for a sweet treat craving anytime. Save to Pinterest
Enjoy the fudgy, single-serving mug brownie, ideal for a sweet treat craving anytime. | messlitreats.com

This little mug brownie taught me that sometimes the best things don't need time or fuss, just honesty and good ingredients. It's become my go-to moment of comfort on days when cooking feels impossible.

Common Recipe Questions

Can I use a different type of milk?

Yes, oat, almond, or any plant-based milk can be used for a dairy-free option without affecting the texture much.

How to prevent overcooking the brownie?

Microwave in short bursts and watch for the top to look set but still moist. Overcooking can make it dry.

What can I add for extra richness?

Add a scoop of vanilla ice cream or drizzle chocolate sauce after cooking to enhance richness and flavor.

Are nuts necessary in this preparation?

Nuts are optional; they add crunch and flavor but can be omitted without compromising texture.

Can vegetable oil be substituted?

Yes, melted butter or coconut oil can be used as alternatives to vegetable oil for a different taste profile.

Mug Brownie Chocolate Cake

A rich and fudgy chocolate treat made quickly in a mug using basic ingredients.

Prep Duration
2 min
Cooking Duration
1 min
Overall Duration
3 min
Created by messli Sophie Lane


Skill Required Easy

Cuisine Origin American

Portion Yield 1 People served

Diet Preferences Meat-Free

List of Ingredients

Dry Ingredients

01 4 tablespoons all-purpose flour
02 4 tablespoons granulated sugar
03 2 tablespoons unsweetened cocoa powder
04 1 pinch salt

Wet Ingredients

01 2 tablespoons vegetable oil (or melted butter)
02 3 tablespoons milk
03 1/4 teaspoon vanilla extract

Optional Add-ins

01 1 tablespoon chocolate chips
02 1 tablespoon chopped nuts

Step-by-Step Directions

Step 01

Combine Dry Ingredients: In a large microwave-safe mug (minimum 12 oz), mix flour, sugar, cocoa powder, and salt thoroughly with a fork.

Step 02

Incorporate Wet Ingredients: Add vegetable oil, milk, and vanilla extract; stir until the batter is smooth and no dry flour remains.

Step 03

Add Optional Mix-ins: Fold in chocolate chips and/or chopped nuts if desired for added texture and flavor.

Step 04

Microwave Cooking: Microwave on high for 50 to 70 seconds until the brownie rises and the surface is set but moist; avoid overcooking.

Step 05

Cool and Serve: Let the brownie cool for one minute before enjoying directly from the mug.

Kitchen Tools Needed

  • Microwave-safe mug (12 oz or larger)
  • Fork or small whisk
  • Microwave

Allergy Warnings

Check all listed ingredients for allergens. Reach out to a healthcare provider if you aren't sure.
  • Contains wheat (gluten) and may include dairy if milk or butter is used.
  • Possible nut allergen if nuts are incorporated.

Nutrition per serving

Nutritional details are just for your reference. Always talk to a doctor for specific health advice.
  • Energy (Calories): 380
  • Fats: 16 g
  • Carbohydrates: 56 g
  • Proteins: 4 g