Chocolate-Mint Bars

Preheat oven to 350°. To prepare bottom layer, combine flour and salt;stir with a whisk. Combine sugar, egg substitute, ¼ cup melted butter, 2 T. water, vanilla, eggs and chocolate syrup in a medium bowl; stir until smooth. Add flour mixture to chocolate mixture, stirring until blended. Pour batter into a 13x9-inch pan coated with cooking spray. Bake for 23 minutes. Cool completely in pan on wire rack. To prepare mint layer, combine powdered sugar, ¼ cup melted butter and next 3 ingredients (throuh food coloring) in a medium bowl; beat with a mixer until smooth. Spread mint mixture over cooled cake. To prepare the glaze, combine the chocolate chips and 3 T. butter in a medium microwave safe bowl. Microwave at HIGH 1 minute or until melted, stirring after 30 seconds. Let stand 2 minutes. Spread chocolate mixture evenly over top. Cover and refrigerate until ready to serve.