INGREDIENTS
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3 large eggs
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1 cup sugar
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1 teaspoon vanilla extract
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1 cup (2 sticks, or 8 ounces) unsalted butter, melted and cooled to lukewarm
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4 cups all-purpose flour
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For The Filling:
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1 1/2 cups packed brown sugar
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1 cup unsalted butter
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1 teaspoon ground cinnamon
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6 tablespoons dark corn syrup (I've used light corn syrup; no notable difference)
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1/2 cup finely ground hazelnuts, optional*
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Coarse sea salt (optional)