"Why settle for one cookie flavor when you can have three? Peanut butter, sugar cookie and fudgy brownie batter are swirled together and baked into one giant cookie, making for a slice-and-bake you'll want to serve at parties and keep in the freezer for a weeknight cookie fix...."
INGREDIENTS
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4 1/2 cups all-purpose flour (see Cook's Note), plus more for dusting
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1 1/2 teaspoons baking soda
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Kosher salt
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4 sticks (1 pound) unsalted butter, at room temperature
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1 1/4 cups dark brown sugar
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1 1/2 cups granulated sugar
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4 large eggs, at room temperature
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1/2 cup creamy peanut butter
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3 teaspoons vanilla extract
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1/2 cup Dutch-process cocoa powder