Chocolate Mint Brownies

1 c. flour
½ c. butter or margarine, softened
½ tsp. salt
4 eggs
1 tsp. vanilla
1 (16 oz) can chocolate-flavored syrup
1 c. sugar

Filling:
2 c. powdered sugar
½ c. butter or margarine, softened
1 Tbsp. water
½ tsp. mint extract
3 drops green food coloring

Topping:
1 (10 oz) pkg. mint chocolate chips
9 Tbsp. butter or margarine

Combine the first 7 ingredients in a large mixing bowl; beat at medium speed for 3 minutes. Pour batter into a greased 13x9-inch pan. Bake at 350* for 30 minutes. Cool completely. Combine filling ingredients in a medium mixing bowl; beat until creamy. Spread over cooled brownies. Refrigerate until set. For topping, melt chocolate chips and butter over low heat in a small saucepan. Let cool for 30 minutes or until lukewarm, stirring occasionally. Spread over filling. Chill before cutting. Store in refrigerator.