Mounds Candy Bar Brownies

2 Mounds candy bars
1/2 cup shortening
1 cup all-purpose flour
1 cup granulated sugar
1/2 teaspoon salt
2 eggs
1 teaspoon vanilla extract
1/2 cup chopped nuts

Melt candy bars and shortening. Remove from heat. Add remaining ingredients and blend well. Spread in greased 9-inch square pan. Bake at 350 degrees F for 25 minutes. While warm, cut into bars.