Buttery Rich Penuche Fudge Recipe - Shock/Seed/Stir Method

INGREDIENTS

2 1/2 cups

brown sugar

2 1/2 cups

white sugar

1/4 cup

corn syrup

1 1/4 cups

evaporated milk (heavy cream, or half & half)

1/2 cup

unsalted butter

3/4 tsp

salt

large bowl of ice cubes

1 tsp

pure vanilla extract

1/2 cup

finely chopped pecans or walnuts (toasted, (optional))