Fudgy, moist, and deeply chocolaty brownies with perfectly crispy edges — a one-bowl recipe baked in an 8x8 pan.
Chef's Note: The combination of granulated and powdered sugar here is doing real work — the powdered sugar's small amount of cornstarch helps give these brownies their signature crackly top and dense, fudgy crumb, rather than a cakier texture. Whichever oil you choose changes the flavor noticeably: olive oil brings a subtle fruity, slightly peppery note that pairs well with the chocolate, while canola oil stays neutral and lets the chocolate speak for itself.
Patience during cooling matters more than it seems — these brownies will look underdone straight from the oven, but cutting into them before they've had their full 2 hours will give you a molten mess instead of clean, fudgy squares. They keep well in an airtight container at room temperature for up to 3 days, or in the freezer for longer storage, and if you prefer an especially firm brownie, a stint in the fridge after cooling does the trick.
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