INGREDIENTS
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1 can (14 ounces) sweetened condensed milk
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1 pound chopped bittersweet or semi sweet chocolate (or the equivalent weight in chocolate chips of the same varieties)
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4 Tablespoons unsalted butter
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1 Tablespoon bourbon
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2 Tablespoons pure vanilla extract (or use 3 tablespoons vanilla if omitting the bourbon)
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1/4 cup dulce de leche
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coarse sea salt flakes, preferably Maldon Sea Salt
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an 8-inch by 8-inch square pan
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non-stick cooking spray
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parchment paper