INGREDIENTS
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1 & 1/2 cups (5.5 to 6 ounces) vanilla wafer crumbs*
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1/2 cup unsalted butter, melted
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1 (0.25-ounce) envelope unflavored gelatin
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2 tablespoons cold water
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3 cups heavy cream, divided
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1/4 cup firmly packed light brown sugar
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1 teaspoon vanilla extract
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store-bought caramel sauce
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sea salt, or other large flake salt