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1
Coat a 9-by-13-by-1 1/2 inch baking pan with cooking spray; set aside.
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2
In a 2-quart saucepan, combine the cream and condensed milk; set aside.
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3
In a heavy 3-to 4-quart saucepan, combine corn syrup, water, sugar, and salt.
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4
Cook, over high heat, stirring with a wooden spoon, until sugar is dissolved, about 5 minutes.
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5
Reduce heat to medium, cook without stirring until the temperature reaches the hard-ball stage on a candy thermometer (260 degrees), about 20 minutes.
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6
Meanwhile, heat the cream mixture over low heat until it is warm- Do not boil.
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7
When the sugar mixture reaches 260 degrees, slowly stir in the butter and warmed cream mixture, keeping the mixture boiling at all times.
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8
Stirring constantly, cook over medium heat until the mixture reaches the firm-ball stage (248 degrees), about 15 minutes.
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9
Stir in the bourbon or vanilla and the nuts.
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10
Immediately pour into the prepared pan and let sit uncovered at room temperature for 24 hours.
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11
Spray a large cutting board generously with vegetable-oil spray and unmold the toffee from the pan onto sprayed surface.
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12
Cut into pieces, and wrap each in cellophane or waxed paper.
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13
Store in an airtight container at room temperature for up to 1 month.
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14
The number of servings depend on how small toffee is cut.
