INGREDIENTS
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Nonstick cooking spray
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Unsweetened cocoa powder, for dusting
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2 1/2 cups all-purpose flour
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3/4 teaspoon baking soda
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1/2 teaspoon salt
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1 cup (2 sticks) unsalted butter
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3/4 cup stout beer, such as Guinness
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12 ounces semisweet chocolate, chopped
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3 large eggs
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1 cup packed dark brown sugar
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1 cup granulated sugar
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1/2 cup sour cream
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1/3 cup heavy whipping cream
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1/4 cup Mexican crema
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Powdered sugar, for garnish
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Fresh mint leaves, for garnish