These ultra-fudgy dark chocolate brownies combine melted dark chocolate, rich cocoa powder, and chocolate chunks for an intensely chocolate-forward bite. Thick and indulgent, a small piece satisfies even the biggest cravings. Thanks to the dark chocolate they’re not cloyingly sweet, and they come together in one bowl for easy prep when you need a decadent dessert fast.
Why you’ll love these brownies
If you prefer fudgy brownies and enjoy the complex flavor of dark chocolate, these are made for you. They’re dense and rich without being overwhelmingly sweet, so a modest square delivers maximum satisfaction. Chocolate chunks folded into the batter add texture and contrast to the ultra-fudgy interior. These brownies are a one-bowl recipe, which makes them quick and low-effort to prepare when a chocolate craving strikes.
What is dark chocolate?
Dark chocolate contains a higher proportion of cocoa solids and cocoa butter than milk chocolate, which gives it more intense chocolate flavor and less sweetness. Percentages typically start around the 50s and increase from there; higher percentages mean a more bitter, less sweet chocolate. In the U.S. the term “dark chocolate” isn’t strictly defined by law the way milk chocolate is, so it can overlap with terms like bittersweet or semi-sweet.
Ingredient highlights
Below are the key components and how they contribute to texture and flavor.
- Butter – Unsalted butter allows you to control the salt level in the final batter.
- Dark chocolate – Use a good-quality bittersweet chocolate (around 60% is what I used). You can melt a chopped bar or chocolate chips; additional chips or chunks are stirred in for pockets of melty chocolate. Choose a higher or lower percentage depending on how sweet you want the brownies.
- Sugars – Both granulated and light brown sugar are used. Brown sugar adds moisture and contributes to a denser, chewier texture while granulated sugar balances sweetness.
- Eggs – Large eggs provide structure and help create that fudgy crumb.
- Cocoa powder – A darker dutched cocoa enhances the deep chocolate flavor, though natural unsweetened cocoa will also work.
- Flour – Standard all-purpose flour provides the structure for these brownies.
- Salt – Salt in the batter and a sprinkle of coarse sea salt on top help balance the chocolate’s richness. The finishing salt is optional but highly recommended for contrast.
Expert tips
- Microwave shortcut: Melt butter and chocolate in a heatproof bowl in 30-second intervals, stirring between each. This makes the recipe one-bowl and minimizes cleanup. Stop heating as soon as the chocolate is nearly melted to avoid scorching.
- Parchment sling: Line your pan with parchment so two sides extend beyond the edges. Once cooled, lift the brownies straight from the pan for easy, neat cutting.
- Two kinds of chocolate: Using both melted chocolate and cocoa powder gives extra depth and fudginess. If chopping a chocolate bar, a serrated knife often works better than a straight-edge knife.
- Don’t overbake: Underbaking slightly yields fudgier brownies. They firm up as they cool, so aim for edges that are set and a center that is just set—about 30 minutes in my oven. The toothpick test is unreliable here because of the fudgy texture and chocolate chunks.
- Measure flour correctly: For consistent results, weigh flour if possible. If using measuring cups, spoon flour into the cup and level it rather than scooping directly from the bag to avoid packing too much flour.
How to cut the brownies neatly
For clean slices, chill the brownies for a few hours before cutting. Use a long, very sharp knife and make straight, single strokes rather than a sawing motion. Wiping the knife between cuts helps keep edges tidy.
Substitutions and variations
Semisweet chocolate can replace dark/bittersweet if you prefer a milder taste; avoid milk chocolate unless you plan to reduce the sugar in the recipe. You can omit the extra chips folded into the batter, though they add nice texture. A 1:1 gluten-free flour may work as a substitute, though this variation is untested. If you only have salted butter, reduce or omit the added salt in the recipe.
FAQs
Use an instant-read thermometer to check the center; aim for 165°F minimum for safety, and 180–190°F for that perfect fudgy set. A toothpick won’t come out clean if the brownies are fudgy, so don’t rely solely on that test.
Yes. Freeze whole, then thaw overnight before slicing for best results. For individual portions, wrap tightly in foil or plastic and store in a freezer-safe bag for up to a couple of months.
Storage
Store the brownies in the refrigerator in an airtight container; they will keep for about a week. If you prefer them less cold, bring them to room temperature for an hour before serving.
For more brownie recipes, check these out:
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Browned Butter Nutella Blondies
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Salted Caramel Pretzel Brownies
-
Oreo Cheesecake Brownies
-
Espresso Brownies
Tag me on Instagram @themarblekitchenblog if you make these—I’d love to see your results. Enjoy!
Dark Chocolate Brownies
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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 in a heatproof bowl and microwave in 30-second intervals, stirring between each, until completely melted.
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Stir in the granulated and brown sugars until combined.
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Add the eggs and stir until incorporated.
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Add the cocoa powder, flour, and salt and stir until almost combined—some streaks of flour are okay. Fold in the chocolate chips or chunks.
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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. If desired, check the center with an instant-read thermometer; aim for about 180–190°F for a fudgy set.
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Allow the brownies to cool slightly, then refrigerate for a couple of hours to firm up before slicing for the cleanest cuts.
Notes
- These brownies are very rich; you can cut smaller pieces to yield up to 25 servings if desired.
- Do not slice immediately from the oven—chill or cool completely so the brownies firm up for cleaner slices.