These one-bowl brownies are fudgy, chewy, and deeply chocolaty with shiny, crackly tops. They come together quickly with simple pantry ingredients and taste better than any boxed mix. No mixer required just one bowl and a spatula.
Why I Love This Recipe
These one-bowl brownies check every box for me. They’re deeply fudgy and chewy with that perfect shiny, crackly top, yet they come together with almost no effort just one bowl, no mixer, and pantry staples I always have on hand.
I love how reliable they are. The combination of granulated and brown sugar keeps them moist, the cocoa and chocolate chunks deliver rich flavor, and a touch of espresso powder makes the chocolate taste even deeper. They’re ready in under an hour, feed a crowd, and taste better than any boxed mix. Whether I’m baking for unexpected guests or just craving something chocolatey, this is the recipe I reach for every time.
Ingredients
(Makes 24 brownies)
- 1 cup unsalted butter, melted and slightly cooled
- 1 cup granulated sugar
- 1 cup packed dark brown sugar
- 4 large eggs, room temperature
- 1 tablespoon pure vanilla extract
- 1 cup all-purpose flour
- 1 cup Dutch-processed or unsweetened cocoa powder
- 1 teaspoon espresso powder (optional, but recommended)
- 1 teaspoon kosher salt
- 1¼ cups chopped semi-sweet chocolate or chocolate chips, divided
How to Make One Bowl Brownies
Follow these steps for fudgy, chewy brownies with shiny, crackly tops.
1. Prepare the Pan
Preheat the oven to 350°F (175°C).
Spray a 9×13-inch baking pan with nonstick cooking spray. Line it with parchment paper, leaving an overhang on the long sides, then spray the parchment as well. This makes it easy to lift the brownies out later.
2. Mix the Wet Ingredients
In a large mixing bowl, whisk together:
- 1 cup melted and slightly cooled unsalted butter
- 1 cup granulated sugar
- 1 cup packed dark brown sugar
Whisk until the mixture is smooth and the sugar is mostly dissolved.
Add 4 large room-temperature eggs and 1 tablespoon pure vanilla extract. Whisk until fully combined and smooth.
3. Add the Dry Ingredients
Sift in:
- 1 cup all-purpose flour
- 1 cup Dutch-processed or unsweetened cocoa powder
Add 1 teaspoon kosher salt and 1 teaspoon espresso powder (optional but recommended).
Stir gently until just combined. Do not overmix—overmixing can make the brownies cakey instead of fudgy.
4. Add the Chocolate
Fold in 1 cup of the chopped semi-sweet chocolate (or chocolate chips).
Spread the batter evenly into the prepared pan. Sprinkle the remaining ¼ cup chopped chocolate over the top.
5. Bake
Bake on the middle rack for 25–30 minutes.
The brownies are done when the top is just set and a toothpick inserted in the center comes out with a few moist crumbs (not wet batter).
Do not overbake—they will continue to set as they cool.
6. Cool and Cut
Let the brownies cool completely in the pan.
Use the parchment overhang to lift them out, then cut into squares with a sharp knife (a plastic knife also works well and reduces sticking).
Optionally finish with a sprinkle of flaky sea salt.
Key Tips for Success
- Use room-temperature eggs for better incorporation.
- Avoid overmixing once the flour and cocoa are added.
- Check for doneness at the 25-minute mark to keep them fudgy.
- Cool completely before cutting for clean slices.
Frequently Asked Questions – One Bowl Brownies
Can I make these brownies gluten-free?
Yes. Substitute the all-purpose flour with a good 1:1 gluten-free flour blend (such as Cup4Cup). The texture remains very close to the original.
Do I have to use espresso powder?
No, it is optional. However, it deepens the chocolate flavor without making the brownies taste like coffee, so it is highly recommended.
Can I add nuts?
Yes. Stir in up to 1 cup of chopped walnuts, pecans, or almonds when you add the chocolate chunks.
Metal pan or glass pan?
A metal pan is preferred because it gives crispier edges and corners. If using a glass pan, you may need to add 3–5 extra minutes of baking time.
How do I know when the brownies are done?
They are ready when the top is just set and a toothpick inserted in the center comes out with a few moist crumbs (not wet batter). Start checking at 25 minutes. Overbaking will make them dry instead of fudgy.
Why didn’t my brownies get a shiny, crackly top?
This usually happens from overmixing the batter after adding the flour and cocoa, or from using cold eggs. Mix only until combined and use room-temperature eggs for best results.
These one-bowl brownies deliver everything you want in a homemade brownie fudgy centers, chewy edges, rich chocolate flavor, and that signature shiny, crackly top—without any fuss. With simple ingredients, minimal cleanup, and reliable results, this recipe earns its place as a go-to dessert for both everyday cravings and last-minute gatherings. Once you try them, boxed mixes will be hard to go back to.
How to Store One Bowl Brownies
Room Temperature
- Uncut brownies kept in the pan and covered tightly will stay fresh for up to 4 days.
- Once cut, wrap individual brownies in plastic wrap or store them in an airtight container. They are best within 1–2 days, as cut edges dry out faster.
Refrigerator
Avoid storing brownies in the fridge if possible—they tend to dry out and lose their fudgy texture.
Freezer
Brownies freeze very well.
- For best results, freeze the whole (or half) pan uncut. Wrap tightly in plastic wrap, then in foil or place in a freezer bag.
- Freeze for up to 3 months.
- Thaw at room temperature before cutting and serving.
Tip: Freezing individual squares works, but they don’t keep quite as well as a larger portion.
One Bowl Brownies
Ingredients
Equipment
Method
- Preheat oven to 350°F. Spray a 9×13-inch baking pan with nonstick cooking spray. Line with parchment paper with an overhang on the sides and spray again. Set the pan aside.
- In a large mixing bowl whisk together melted butter, granulated sugar, and brown sugar. Whisk until sugar is dissolved. Add the eggs and vanilla extract until smooth and combined.
- Sift in flour and cocoa. Add the salt and espresso powder, if using, and stir until just combined. Don’t over mix. Fold in 1 cup of chopped chocolate.
- Spread evenly into prepared pan and sprinkle the remaining 1/4 cup of chopped chocolate on top of the brownies.
- Bake for 25-30 minutes on the middle rack in the oven until the brownies are just set to touch. Don’t over bake the brownies. They will set up as they cool.
- Remove from oven and let cool before cutting into squares. You can sprinkle them with a little flaky sea salt, if desired.