Chocolate Mint Brownies

1 cup flour
1 cube butter or margarine (soft)
½ tsp. salt
4 eggs
1 tsp. vanilla
1 (16 oz.) can chocolate syrup (1 1/3 cup)
1 c. sugar

Filling:
2 c. confectioners sugar
1 cube butter or margarine (soft)
1 Tbsp. water
½ tsp. mint extract
3 drops green food color

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

Combine first 7 ingredients in mixing bowl. Beat on medium for 3 minutes. Pour batter into greased 9x13x2 inch pan. Bake at 350 for 30 minutes. Cool completely on wire rack (approximately 4 hours). Combine filling ingredients. Beat until creamy and spread over cooled brownies. Refrigerate until set. Melt chocolate chips and butter for approx. 1 minute in the microwave. Stir well to completely melt chocolate. Add more time if necessary. Let cool for 30 minutes or until lukewarm. Stir occasionally. Spread over filling. Chill before cutting. Store in refrigerator. Brownies will keep in an airtight container in refrigerator for up to 2 weeks.