Chocolate Brownies

1 cup butter 6 squares unsweetened chocolate 4 eggs 2 cups sugar 1 tablespoon vanilla 1/2 cup flour 1 cup semi-sweet chocolate chips
Melt butter and chocolate together. In a large bowl beat eggs. Blend in sugar. Add chocolate mixture and vanilla. Stir in flour and chocolate chips. Pour into a greased 8 inch square pan. Bake at 300 degrees F. for 45 to 55 minutes. Cool and cut into squares. Store in refrigerator.