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1
Line an 8-inch (20-cm) square pan with plastic wrap and lightly oil.
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2
In a saucepan, combine the brown sugar, cream, sugar, maple syrup, butter and salt and bring to a boil, stirring with a wooden spoon to dissolve the sugar.
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3
Attach a candy thermometer in the center of the pan and simmer over medium heat without stirring until the thermometer reads 237 degrees F (114 degrees C).
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4
Add the vanilla extract without stirring. Place the pan in a cold water bath. Cool, without stirring, until the thermometer reads 113 degrees F (45 degrees C), about 20 minutes. Remove the pan from the water bath.
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5
Using an electric mixer or a wooden spoon, stir vigorously until the mixture begins to lighten in color and become creamy, 2 to 3 minutes. Please note that if you whip too much, the sugar and cream mixture will harden before you have time to pour it into the pan.
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6
Pour immediately into the prepared pan and smooth with a spatula. Garnish with crushed toasted pecans and Maldon salt.
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7
Cover with plastic wrap. Let cool for about 1 hour at room temperature or 30 minutes in the refrigerator. Remove from the pan and remove from the plastic wrap. Cut into squares. Store in an airtight container.