01 -
Line an 8x8-inch (20x20 cm) baking pan with waxed paper and butter the paper to prevent sticking.
02 -
In a saucepan over medium heat, bring the maple syrup, heavy cream, and dark brown sugar to a boil. Continue boiling without stirring until the mixture reaches 240°F (116°C) on a candy thermometer.
03 -
Remove from heat, then add the butter and salt. Allow the mixture to cool without stirring until it reaches 105°F (41°C).
04 -
Stir in the chopped walnuts and vanilla extract, then beat the mixture until it loses its gloss.
05 -
Pour the fudge into the prepared pan and let it cool to room temperature.
06 -
Once fully cooled, cut the fudge into pieces, wrap individually, and store in the refrigerator.