Chocolate Syrup Brownies

I have tried A lot of brownie recipes, and this the best one yet. Somehow they disappear every time I make them hmmmm....


1/2 cup butter 1 cup white sugar 4 eggs 1 (16 ounce) can chocolate syrup 1 teaspoon vanilla extract 1 1/8 cups all-purpose flour 1/2 cup chopped walnuts 1/3 cup evaporated milk 1/4 cup butter 1 1/2 cups white sugar 1/2 cup semisweet chocolate chips

Directions
Preheat oven to 350 degrees
Place 1/2 cup butter, 1 cup sugar, eggs, chocolate syrup, vanilla, flour and 1/2 cup nuts in a mixing bowl; beat well. Spread batter in a 15 x 12 inch pan.
Bake at 350 degrees F (175 degrees C) for 25 to 30 minutes.
Combine remaining 1/4 cup butter and 1 1/2 cups sugar in heavy saucepan. Add milk, and boil for 30 seconds. Remove pan from heat. Stir in chocolate chips, and beat until thickened. Frost brownies while still warm.