Caramel Brownies

2 sticks butter
4 oz unsweetened chocolate
4 eggs
2 cups sugar
1 cup flour
1 teaspoon vanilla
1 teaspoon salt
1/2 cup chopped pecans
1 (14-oz) package caramels
1/3 cup evaporated milk

Preheat oven to 350 degrees. Melt butter and chocolate. Allow to cool. Beat eggs and sugar, then add to chocolate. Stir in flour, vanilla, salt, and pecans. Put half of mixture into greased 9x13 pan. Bake 15 minutes. While this is baking, heat caramels and milk, stirring constantly until caramels are melted. Spread caramels on brownies and top with remaining half of batter. Bake 30 minutes. Cool and cut.