Buttery Penuche (Brown Sugar) Fudge - cooking recipe

Ingredients

2/3 cup canned evaporated milk
2 cups firmly packed brown sugar
3/4 cup unsalted butter, cut into chunks
1/4 teaspoon salt
3/4 teaspoon vanilla
1 3/4 cups powdered sugar
1 cup toasted walnuts (optional)

Preparation

In a heavy medium sized pot, bring first 4 ingredients to a boil over medium-high heat, stirring constantly.
Reduce heat to low and stir frequently until candy thermometer reads 240\u00b0F (soft ball stage) (this will take about 20-30 minutes).
Pour into a metal bowl as a plastic one will melt and add vanilla.
Beat with electric mixer at medium speed.
Add powdered sugar slowly and continue beating until fudge is thick and smooth (about 3-4 minutes).
Add walnuts and stir with spoon.
Spread in an ungreased 8\" square pan and refrigerate-uncovered for about 30 minutes.
Cut into small squares and eat.