Can I use salted butter instead of unsalted butter?

Yes, you can use salted butter if you don’t have unsalted butter on hand. Just be aware that it might slightly alter the taste by adding a hint of saltiness to the brownie.

Can I substitute the brown sugar with white sugar?

While you can use white sugar instead of brown sugar, it will change the texture and flavor slightly. Brown sugar adds moisture and a deeper flavor due to the molasses content, which white sugar lacks.

Can I make this brownie without an egg?

Yes, you can substitute the egg yolk with 1 tablespoon of unsweetened applesauce or yogurt. This might slightly change the texture but will still yield a delicious brownie.

Can I bake this in the microwave instead of an oven or air fryer?

Yes, you can microwave the brownie. Use a microwave-safe mug or bowl and microwave on high for about 1 minute. The exact time may vary depending on your microwave’s power.

Can I add nuts or other mix-ins to the batter?

Absolutely! Feel free to add chopped nuts, dried fruits, or additional chocolate chips to the batter for extra flavor and texture.

How do I know when the brownie is done?

The brownie is done when the edges are set and the center is slightly firm but still soft. It should not be jiggly. Baking times can vary, so start checking a minute or two before the suggested time.

Can I make this recipe vegan?

Yes, to make it vegan, you can substitute the butter with a plant-based margarine or oil, and replace the egg yolk with a vegan egg substitute or 1 tablespoon of unsweetened applesauce.

Can I double the recipe?

Yes, you can double the recipe if you want to make two servings. Just make sure to use separate ramekins or molds to ensure even baking.

Can I use a different type of flour?

You can experiment with different types of flour, such as whole wheat or gluten-free flour. However, the texture might vary slightly from the original recipe.

How should I store leftovers?

Single-serve brownies are meant to be enjoyed fresh. However, if you have leftovers, cover the brownie and store it at room temperature for up to a day. Reheat briefly in the microwave before enjoying.

Can I Make a Single Serve Brownie Without Cocoa Powder

Yes. Substitute each tablespoon of cocoa with one tablespoon of melted dark chocolate. This gives a smoother, richer flavor and a slightly denser texture.

What Is the Best Mug Size for a Microwave Brownie

A 300 to 350 ml mug is ideal. It provides enough space for the batter to rise without spilling over the sides.

How Can I Make the Brownie Healthier

Swap butter with Greek yogurt or coconut oil, and replace part of the flour with oat flour. It adds a subtle nuttiness while keeping the brownie soft and moist.

Can I Double the Recipe

Yes. Prepare two separate ramekins for even baking. Doubling the batter in one dish leads to underbaking in the center and overbaking on the edges.

Why Does My Brownie Lack a Crackly Top

The shiny crust forms when sugar dissolves completely into the butter. Whisk the sugar and butter mixture thoroughly before adding the dry ingredients to achieve that glossy finish.

Can I Use an Air Fryer Instead of an Oven

Yes. Air fry the brownie at 160°C for 8 minutes. The result is a slightly crisp top with a perfectly fudgy interior.

How Should I Store Leftover Brownie

Although single-serve brownies are best enjoyed fresh, cover and store them at room temperature for up to a day. Reheat briefly in the microwave to restore their soft texture.

How Do I Make It Gluten-Free

Use almond flour or a gluten-free baking blend in place of all-purpose flour. The brownie will remain dense and chocolatey, with a slight nutty flavor.

How Do I Get a Cakey Texture Instead of Fudgy

Add a pinch of baking powder and bake for an extra minute. This small change gives a lighter crumb and a more cake-like bite.

Can I Add Mix-Ins Like Nuts or Chocolate Chips

Absolutely. Add them before baking to keep the texture even and the add-ins distributed throughout each bite.

Single Serve Brownie Recipe That’s Truly Fudgy

Name: Single Serve Brownie - Catherine Zhang
Prep time: 5 min
Cook time: 10 min
Total time: 15 min
Yield: 1
Cuisine: American
Ingredients: Wet ingredients: unsalted butter; brown sugar; granulated sugar; egg yolk; Dry ingredients: cocoa powder; all-purpose flour; Optional: chocolate chips

Single Serve Brownie

Print Recipe

5 Stars 4 Stars 3 Stars 2 Stars 1 Star

5 from 1 review

Warm, rich and chocolatey brownie ready in less than 15 minutes with this easy single serve brownie recipe!

Author: Catherine Zhang
Prep Time: 5 minutes
Cook Time: 10 minutes
Total Time: 15 minutes
Yield: 1 Serve 1x
Category: Bars
Method: Easy
Cuisine: American

Ingredients

Scale

3 tbsp Unsalted butter, melted
3 tbsp Brown sugar
1 tbsp Granulated sugar
1 Large egg yolk
4 tbsp Cocoa powder
1 tbsp All-purpose flour
1 tbsp Chocolate chips, optional

Cook Mode Prevent your screen from going dark

Instructions

Combine the melted butter, brown sugar, granulated sugar, and egg yolk in a small bowl, and whisk to combine
Add the cocoa powder and flour and mix until just combined
Pour the brownie batter into a small ramekin or mold and top with chocolate chips
Preheat the oven to 180C/350F or the air fryer to 170C/338F
Bake the brownie in the oven for 12 minutes, or in the air fryer for 10 minutes, or until set
Remove from the heat and cool for 5 minutes before enjoying

Find it online: https://zhangcatherine.com/single-serve-brownie/