INGREDIENTS
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1 pound (3 1/4 cups) all-purpose flour
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1 tablespoon coarse salt
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4 sticks softened unsalted butter, plus more for pans
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2 cups packed dark-brown sugar
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1 teaspoon pure vanilla extract
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9 large, room-temperature eggs
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2 cups toasted, chopped walnuts
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1 cup pure maple syrup
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1 cup packed light-brown sugar
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1 stick unsalted butter
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1 teaspoon coarse salt
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1/4 cup heavy cream
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1 or 2 sliced peaches