Name: Easy Brownie in a Mug Recipe
Prep time: 2 min
Cook time: PT-498074H36M1S
Total time: 4 min
Cuisine: American
Ingredients: 45 g (3 tablespoons) Greek yogurt, nonfat or full-fat; 30 g (1/3 cup) oat flour; 15 g (2 tablespoons) unsweetened cocoa powder; 1 tablespoon granular sweetener, such as erythritol or coconut sugar; 1/3 teaspoon baking powder; 1/4 teaspoon instant coffee or espresso powder (optional); 30 ml (2 tablespoons) milk of choice; 1 pinch salt; 1–2 teaspoons chocolate chips, or to taste

Jump to Recipe

When you are craving a warm, chocolatey dessert but want to keep your goals on track, baking a full pan of traditional brownies can lead to extra effort and unwanted leftovers. Standard bakery brownies are often packed with heavy butter, refined white sugar, and excess oil that leave you feeling sluggish. This Healthy Brownie in a Mug delivers all the rich, fudgy, and decadent cocoa flavor of a classic bakery treat in under two minutes—using wholesome, nutrient-dense ingredients.

By replacing traditional butter and oil with protein-rich Greek yogurt and swaping refined flour for fiber-filled oat flour, this single-serve brownie delivers an amazingly soft and moist center. It is the ultimate guilt-free treat for late-night cravings, quick afternoon snacks, or post-workout chocolate fixes.

Why You Will Love This Healthy Mug Brownie

Ready in Under 2 Minutes: Quick and effortless to assemble directly inside your mug with minimal cleanup required.
Wholesome & High-Protein Base: Made with Greek yogurt and oat flour to provide natural protein and dietary fiber without relying on heavy oils or butter.
Rich Fudgy Texture: Keeps the center soft, warm, and gooey, mimicking the texture of a traditional fudgy brownie edge.
Single-Serve Convenience: Perfectly portioned for one person, making it easy to satisfy a sweet craving without any temptation to overindulge.

Simple Ingredients for a Wholesome Treat

This recipe uses simple pantry staples and nutrient-dense ingredients to create a rich chocolate batter.

Brownie Ingredients

45g (3 tablespoons) Greek yogurt: Replaces butter and oil while adding moisture and a protein boost (nonfat or full-fat works great).
30g (1/3 cup) oat flour: Forms a tender, wholesome, and fiber-rich base for the batter.
15g (2 tablespoons) unsweetened cocoa powder: Delivers deep, authentic dark chocolate flavor.
1 tablespoon granular sweetener (such as erythritol or coconut sugar): Sweetens the brownie to your taste.
1/3 teaspoon baking powder: Gives the mug brownie a subtle rise while keeping it fudgy.
1/4 teaspoon coffee powder (optional): Enhances and deepens the natural cocoa flavor without making it taste like coffee.
30ml (2 tablespoons) preferred milk: Binds the wet and dry ingredients into a smooth, pourable batter.
A pinch of salt: Balances the sweetness and heightens the chocolate notes.
Chocolate chips: Sprinkled over top to create melted, gooey chocolate pockets as it cooks.

Step-by-Step Instructions

Follow these three straightforward steps to mix, cook, and enjoy your healthy mug brownie.

Step 1: Mix Wet Base & Spices

Grab a microwave-safe mug (at least 8 to 10 ounces in size).
Add 45g (3 tablespoons) of Greek yogurt, 1 tablespoon of granular sweetener, 15g (2 tablespoons) of unsweetened cocoa powder, 1/4 teaspoon of coffee powder (if using), and a pinch of salt directly into the mug.
Stir with a spoon or fork until smooth, creamy, and fully combined.

Step 2: Add Dry Ingredients & Chocolate

Sift in 30g (1/3 cup) of oat flour and 1/3 teaspoon of baking powder into the mug.
Pour in 30ml (2 tablespoons) of your preferred milk.
Mix thoroughly until a smooth, thick brownie batter forms without any dry flour clumps.
Top the surface of the batter with your desired amount of chocolate chips.

Step 3: Cook and Serve

Place the mug into the microwave and cook on high power for 1 minute to 1 minute 30 seconds. (Alternatively, bake in a preheated oven at 350°F / 180°C for about 10 minutes).
Remove carefully from the microwave and let it cool slightly for 1 to 2 minutes so the center sets into a fudgy texture. Serve warm and enjoy!

Pro Tips for the Best Fudgy Mug Brownie

Do Not Overcook: Microwaves vary in strength. Check your brownie at the 1-minute mark; stopping while the top is slightly soft ensures the center remains fudgy rather than dry or cakey.
Use Coffee Powder for Flavor Depth: Adding a pinch of instant coffee powder or espresso powder naturally intensifies the chocolate notes without leaving a coffee taste behind.
Choose Your Favorite Greek Yogurt: Full-fat Greek yogurt adds extra richness, while nonfat Greek yogurt keeps the calories lower while preserving moisture.
Make Your Own Oat Flour: If you do not have oat flour on hand, simply blend rolled oats in a blender or food processor for 15 seconds until finely ground.

Storage and Single-Serve Guidelines

Enjoy Fresh: This single-serve recipe is designed to be prepared and enjoyed fresh out of the microwave for the ultimate warm, fudgy texture.
Quick Serving Suggestions: Top your warm mug brownie with a scoop of low-calorie vanilla ice cream, fresh raspberries, or a spoonful of almond butter for an extra decadent finish.

FAQs

Why is Greek yogurt used instead of butter or oil?

Greek yogurt provides the essential fats and moisture needed to keep the brownie fudgy while significantly cutting down on calories and adding high-quality protein to your dessert.

Can I make this brownie in the oven instead of a microwave?

Yes! Mix the batter in an oven-safe ramekin and bake at 350°F (180°C) for approximately 10 to 12 minutes until the edges are set and the center is warm.

How do I keep my mug brownie from drying out?

A dry mug brownie is almost always the result of microwaving for too long. Stop cooking as soon as the top springs back slightly but still looks moist in the center.

Can I use a liquid sweetener like maple syrup or honey?

Yes! You can substitute the granular sweetener with 1 tablespoon of pure maple syrup, honey, or agave nectar. If the batter feels too thin, reduce the milk by a splash.