Fudgy one-bowl gluten-free brownies

A great brownie has a rich chocolate flavor, a dense and fudgy center, and a beautiful crackly top. This recipe delivers all of those classic qualities in a straightforward gluten-free version that you can make in a single bowl. By starting with melted butter, you can mix the entire batter by hand without needing a stand mixer.

This method is designed for simplicity and reliability. Using unsweetened cocoa powder provides intense chocolate flavor, while a short rest for the batter helps ensure the texture is smooth and never gritty. The result is a pan of deeply satisfying brownies perfect for any occasion, from a simple weekday treat to a special dessert.

The recipe

Makes 16 browniesHands-on 15 minStart to finish 1 hr 15 min

Ingredients

• 1/2 cup (113 g) unsalted butter, cut into pieces
• 1 cup (200 g) granulated sugar
• 2 large eggs, at room temperature
• 1 teaspoon vanilla extract
• 1/2 cup (about 45 g) unsweetened cocoa powder
• 1/2 cup (about 70 g) gluten-free all-purpose flour blend (one that contains xanthan gum)
• 1/4 teaspoon baking powder
• 1/4 teaspoon salt
• 1 cup (about 170 g) semisweet chocolate chips

Method

1. Prepare oven and pan. Preheat your oven to 350°F (175°C). Grease an 8×8 inch (20×20 cm) square baking pan and line it with parchment paper, leaving an overhang on two sides to use as handles later.
2. Melt butter. In a large, microwave-safe mixing bowl, melt the butter in the microwave in 30-second intervals until fully melted. You can also melt the butter in a small saucepan on the stove and pour it into your mixing bowl.
3. Mix wet ingredients. Whisk the granulated sugar into the hot melted butter until well combined. Add the room temperature eggs one at a time, whisking well after each addition. Stir in the vanilla extract.
4. Add dry ingredients. Place a fine-mesh sieve over the bowl and sift in the cocoa powder, gluten-free flour blend, baking powder, and salt. Whisk everything together until just combined and no dry streaks remain. Do not overmix the batter.
5. Add chocolate chips. Gently fold in the chocolate chips with a spatula until they are evenly distributed throughout the batter.
6. Rest the batter. Cover the bowl with a clean kitchen towel and let the batter rest at room temperature for 30 minutes. This step helps hydrate the gluten-free flours and results in a better texture.
7. Bake the brownies. After resting, give the batter a final stir and pour it into the prepared baking pan. Spread it into an even layer with your spatula. Bake for 28 to 32 minutes, or until the edges are set and a wooden skewer inserted into the center comes out with moist, fudgy crumbs attached, but not wet batter.
8. Cool completely. Place the pan on a wire rack and let the brownies cool completely in the pan, for at least 2 hours. Cooling fully is essential for the brownies to set properly and for clean slicing. Once cool, use the parchment paper handles to lift the brownies out of the pan and cut them into 16 squares.

Why this one-bowl method works

This recipe is designed for both ease and excellent results. Starting with melted butter, rather than softened butter, eliminates the need for an electric mixer. You can whisk all the ingredients together by hand in the same bowl the butter was melted in, which simplifies the process and reduces cleanup.

Whisking the sugar into the hot butter helps dissolve the sugar crystals. This simple action is what helps create the classic shiny, crackly crust on top of the brownies. Using unsweetened cocoa powder instead of melted chocolate provides a deep, concentrated chocolate flavor and contributes to the dense, fudgy texture that defines this type of brownie.

Tips for fudgy gluten-free brownies

A few key techniques help ensure your gluten-free brownies turn out fudgy every time.

The importance of resting the batter

Letting the batter rest for 30 minutes before baking is a vital step in gluten-free baking. Unlike wheat flour, gluten-free flours and starches take longer to absorb moisture. This rest period gives them time to fully hydrate, which smooths out the batter. Skipping this step can result in a slightly gritty or sandy texture in the finished brownies. The rest period allows the starches to swell, leading to a more cohesive structure and a much better mouthfeel.

Do not overbake

The line between a fudgy brownie and a dry, cakey one is very fine. It is better to err on the side of underbaking. When you test for doneness with a wooden skewer or toothpick, you want to see moist, sticky crumbs clinging to it. If it comes out clean, the brownies are likely overbaked and will be dry. If it comes out with wet, liquid batter, they need a few more minutes. The brownies will continue to cook and set from residual heat as they cool in the pan.

Cool before cutting

Patience is essential for good brownies. They are very soft and delicate when they first come out of the oven. Letting them cool completely in the pan for at least two hours is necessary. This cooling time allows the structure to firm up, making them easy to lift out of the pan and slice into clean, neat squares. Cutting into them while warm will result in a crumbly, gooey mess.

Ingredient substitutions and variations

While this recipe works well as written, you have some options for adjustments.

• Dairy-free option: To make these brownies dairy-free, substitute the unsalted butter with an equal amount of a plant-based buttery stick. Also, be sure to use dairy-free chocolate chips.
• Chocolate chips: You can swap the semisweet chocolate chips for dark chocolate, milk chocolate, or white chocolate chips. A mix of different types also works well. For a different texture, you can use chopped nuts like walnuts or pecans, either in place of or in addition to the chocolate chips. Add about 3/4 cup of chopped nuts when you fold in the chips.
• Gluten-free flour blend: This recipe is designed for use with a standard commercial gluten-free all-purpose flour blend containing xanthan gum. If your blend does not contain a binder, you will need to add about 1/4 teaspoon of xanthan gum with the dry ingredients. Using single-ingredient flours like almond flour or coconut flour is not recommended, as they will not produce the same texture. For best results, you can also make a gluten-free all-purpose flour blend at home.

Storing gluten-free brownies

Proper storage keeps your brownies fresh and fudgy. Store them in an airtight container at room temperature for up to four days. Slicing them only as you are ready to eat them can also help prevent the cut edges from drying out.

For longer storage, you can freeze the brownies. You can freeze the entire uncut slab or individual squares. Wrap them tightly in plastic wrap, then place them in a freezer-safe bag or container. They will keep well in the freezer for up to three months. To thaw, let them sit at room temperature for a couple of hours before serving. This is a great way to prepare for events or pack for gluten-free travel.

When to loop in your doctor or dietitian

If you are considering a gluten-free diet for the first time because of digestive symptoms or other health concerns, it is best to speak with a doctor before making any changes. Testing for celiac disease is most accurate while gluten is still actively being consumed.

For those with a new diagnosis of celiac disease or another gluten-related disorder, working with a registered dietitian can be very helpful. A dietitian can provide guidance on building a balanced and nutritious gluten-free diet, reading labels, and avoiding cross-contact to ensure your dietary needs are met safely and effectively.