Chocolate-Mint Bars

Bottom layer:
1 cup all-purpose flour (about 4 1/2 ounces)
1/2 teaspoon salt
1 cup granulated sugar
1/2 cup egg substitute
1/4 cup butter, melted
2 tablespoons water
1 teaspoon vanilla extract
2 large eggs, beaten
1 (16-ounce) can chocolate syrup
Cooking spray

Mint layer:
2 cups powdered sugar
1/4 cup butter, melted
2 tablespoons fat-free milk
1/2 teaspoon peppermint extract
2 drops green food coloring

Glaze:
3/4 cup semisweet chocolate chips
3 tablespoons butter

Preheat oven to 350°.
To prepare bottom layer, lightly spoon flour into a dry measuring cup; level with a knife. Combine flour and salt; stir with a whisk. Combine granulated sugar, egg substitute, 1/4 cup melted butter, 2 tablespoons 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 13 x 9–inch baking pan coated with cooking spray. Bake at 350° for 23 minutes or until a wooden pick inserted in center comes out almost clean. Cool completely in pan on a wire rack.
To prepare mint layer, combine powdered sugar, 1/4 cup melted butter, and next 3 ingredients (through 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 tablespoons 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. Cut into 20 pieces.