INGREDIENTS
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Brownies:
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Nonstick cooking spray, for spraying the baking sheet
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1 cup granulated sugar
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1 cup dark brown sugar
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2 teaspoons vanilla extract
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1/2 teaspoon kosher salt
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4 large eggs
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2 sticks (1 cup) unsalted butter
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8 ounces semisweet chocolate chips
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1/2 cup all-purpose flour
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1/2 cup cocoa powder
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Bombe:
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1 quart chocolate ice cream, softened
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1 1/2 cups heavy cream
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3 tablespoons granulated sugar
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1 tablespoon cocoa powder, plus more in a shaker or sifter, for serving
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1/2 cup hot fudge, warmed slightly
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1/3 cup chopped walnuts