Steps
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Preheat your oven to 350°F (175°C). Line an 8x8-inch baking pan with parchment paper, leaving overhang on two sides for easy removal. Lightly grease the parchment with butter.
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Melt the butter and chopped dark chocolate together in a medium saucepan over low heat, stirring constantly until smooth and glossy. Remove from heat and let cool for 3 minutes. Stir in the coconut sugar until fully dissolved. Add the eggs one at a time, beating well after each addition, then stir in the vanilla extract. The batter should look thick and shiny.
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Sift the oat flour, cocoa powder, and sea salt directly into the chocolate mixture. Fold gently with a spatula until just combined — about 40 strokes. Do not overmix. A few streaks of flour are fine.
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Pour the batter into the prepared pan and spread it evenly. Scatter the dark chocolate chips over the top and sprinkle with flaky sea salt. Bake for 22-25 minutes until the top is set and a toothpick inserted in the center comes out with moist crumbs (not wet batter). Let the brownies cool completely in the pan before lifting out by the parchment and slicing. For the fudgiest texture, refrigerate for 1 hour before cutting.
Why It Works
Starting with real melted dark chocolate (85%+ cacao) rather than just cocoa powder is what makes these brownies truly fudgy — the cocoa butter in the chocolate creates a dense, melt-in-your-mouth texture that cocoa powder alone cannot achieve. Combining melted chocolate with Dutch-process cocoa gives you the best of both worlds: richness from the bar chocolate and deep flavor intensity from the cocoa. Coconut sugar adds a subtle molasses-like depth and retains minerals like iron, zinc, and potassium that are completely absent from the refined white sugar in boxed mixes. Butter provides clean fat and flavor, replacing the soybean oil and artificial emulsifiers found in commercial brownies. Using minimal oat flour keeps the structure light on starch and heavy on chocolate, which is exactly what a fudge brownie should be. The low flour ratio means more chocolate flavor in every bite and a texture that is dense and truffle-like rather than cakey.
Tips
- Cool completely before cutting. This is the hardest part but the most important. Brownies set as they cool, and cutting too early gives you a crumbly mess instead of clean, fudgy squares. Refrigerating them for an hour makes slicing much easier.
- Customize the toppings. Skip the chocolate chips and top with chopped walnuts, a swirl of almond butter before baking, or a sprinkle of espresso powder for a mocha version. The base recipe is endlessly adaptable.
- Freeze individual portions. Wrap cut brownies individually in parchment and freeze for up to 3 months. They thaw in about 20 minutes at room temperature, or microwave for 15 seconds for a warm, gooey center.
