These ultra-fudgy dark chocolate brownies combine melted dark chocolate, dark cocoa powder and chocolate chunks for an intensely chocolate-forward treat. Dense and richly flavored, a small piece goes a long way. The dark chocolate keeps the sweetness balanced so the overall taste is deep rather than cloying. This is a one-bowl recipe that’s quick to assemble when a serious chocolate craving hits.
Why you’ll love these brownies
If you crave a fudgy brownie and prefer dark chocolate, these are perfect. They are rich and dense without being overly sweet, and the chocolate chunks add a pleasant contrast in texture. These brownies are made in one bowl, so they’re both convenient and delicious when you want something indulgent with minimal fuss.
What is dark chocolate?
Dark chocolate contains a higher percentage of cocoa solids and cocoa butter than milk chocolate, which makes it more bitter and less sweet. The remaining percentage typically includes sugar and sometimes dairy or flavorings. In the U.S. there isn’t a single legal definition that fixes a minimum cocoa percentage for “dark chocolate,” so labels may vary and terms like bittersweet or semisweet are often used. Percentages generally start around the 50s and go higher; a higher percentage means a less sweet, more intense chocolate flavor.
Ingredient highlights
Here’s a quick breakdown of the key ingredients and why they matter.
- Butter – Unsalted butter lets you control the salt level. It contributes richness and tenderness.
- Dark chocolate – I used 60% bittersweet chocolate (Ghirardelli). Use a good-quality baking bar or chocolate chips, melted into the batter, and fold in extra chunks or chips for texture. Pick the percentage to suit your sweetness preference—higher percentage = less sweet.
- Sugars – This recipe uses both granulated and light brown sugar. Brown sugar adds moisture and helps produce a denser, fudgier brownie.
- Eggs – Large eggs add structure and richness; using consistent egg size helps maintain the right texture.
- Cocoa powder – A dutched cocoa (like Hershey’s Special Dark) deepens the chocolate flavor, though natural unsweetened cocoa also works.
- Flour – Standard all-purpose flour is used to provide structure.
- Salt – Salt in the batter and a sprinkle of coarse finishing salt on top balance sweetness and amplify flavor. Finishing salt is optional but highly recommended for contrast.
Expert tips
- Use the microwave to melt butter and chocolate quickly: heat in 30-second intervals and stir between pulses to avoid burning. A large heatproof bowl makes this a true one-bowl recipe. Alternatively, melt on the stovetop if you prefer.
- Line your pan with a parchment paper sling so two opposite sides overhang. Once cooled, you can lift the whole brownie slab from the pan for easy slicing. Metal binder clips work well to hold the parchment in place while pouring the batter.
- Two types of chocolate—using both cocoa powder and melted chocolate boosts richness and fudginess. If chopping a chocolate bar, a serrated knife (bread knife) makes the job easier than a standard chef’s knife.
- Don’t overbake—fudgy brownies rely on careful baking. These are better slightly underbaked than overbaked because they firm up as they cool. Look for slightly puffed edges and a set center; baking takes about 30 minutes in my oven. The toothpick test can be unreliable with fudgy brownies, so an instant-read thermometer (180–190°F for a gooey, fudgy center) is helpful.
- Measure flour correctly—for best consistency, weigh flour with a kitchen scale. If you don’t have one, fluff the flour, spoon it into the cup, and level it off instead of scooping directly.
How to cut the brownies neatly
For clean slices, chill the brownies in the refrigerator for a few hours before cutting. Use a long, very sharp knife and make single straight cuts rather than sawing. Wipe the knife clean between cuts for the neatest edges.
Substitutions and variations
If you don’t have bittersweet or dark chocolate, semisweet chocolate is an acceptable substitute. I don’t recommend using milk chocolate unless you reduce the sugar, as it will make the brownies much sweeter. You can omit the extra chips folded into the batter if you’d like a uniform texture, though the chunks add a pleasing contrast.
For a gluten-free version, you could likely swap a 1:1 gluten-free baking flour for all-purpose flour, though I haven’t tested it myself. If you only have salted butter, reduce or omit the added salt in the recipe.
FAQs
An instant-read thermometer is the most reliable test: aim for at least 165°F for safe-to-eat brownies, and 180–190°F for that ideal fudgy set. A toothpick may still show some moist crumbs for fudgy brownies, so don’t expect it to come out perfectly clean.
Yes. Freeze the whole slab for best results and thaw overnight before slicing. For leftovers, wrap tightly in foil or place in a zip-top bag; they keep well for a couple of months.
Storage
Store the brownies covered in the refrigerator for up to a week. Pull them out about an hour before serving if you prefer them less chilled.
For more brownie recipes, check these out:
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Browned Butter Nutella Blondies
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Salted Caramel Pretzel Brownies
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Oreo Cheesecake Brownies
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Espresso Brownies
Tag me on Instagram @themarblekitchenblog if you make these and leave a rating and comment below! Enjoy.
Dark Chocolate Brownies
Ingredients
- 12 tablespoons unsalted butter cubed
- 8 oz dark chocolate good quality chips or finely chopped bar
- 1 cup (200 grams) granulated sugar
- ½ cup (100 grams) light brown sugar packed
- 3 large eggs
- ⅓ cup (26 grams) cocoa powder ideally Hershey’s Special Dark Cocoa powder
- 1 cup (120 grams) all-purpose flour
- ¾ teaspoon salt
- 1 cup dark chocolate chunks/chips
Instructions
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Preheat the oven to 350°F and line an 8 x 8-inch pan with parchment paper leaving an overhang on two sides, or spray the pan with cooking spray.
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Combine the butter and chopped chocolate (or chips) in a heatproof bowl and microwave in 30-second increments, stirring between each, until completely melted.
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Stir in the granulated and brown sugar until combined.
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Add the eggs and stir until fully incorporated.
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Add the cocoa powder, flour and salt and stir until almost combined; some streaks of flour are fine. Fold in the chocolate chunks/chips until just mixed.
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Pour the batter into the prepared pan and smooth the top.
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Bake about 30 minutes, until the edges are slightly puffed and the center is set. For a fudgy center, aim for an internal temperature around 180–190°F.
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Allow the brownies to cool slightly, then refrigerate for a couple of hours so they firm up and are easier to slice neatly.
Notes
- These brownies are very rich; cutting them into smaller pieces can increase the yield (for example, a 5 x 5 grid yields about 25 smaller brownies).
- Do not cut them straight from the oven. Let them cool completely or chill in the refrigerator before slicing for clean edges.