Preheat oven to 350 degrees F. Line an 8x8x2-inch baking pan with foil, leaving 1 inch of foil hanging over edges. Coat with nonstick cooking spray; set aside. In a large microwave-safe mixing bowl combine the chocolate, butter and water. Microwave, uncovered, on 100% power (high) for 1 minute, stirring after 30 seconds. Remove and stir until smooth.
Add granulated sugar and brown sugar; stir to combine. Add eggs and vanilla; stir to combine. Stir in flour, almonds, and salt until smooth. Spoon batter into prepared pan.
Bake for 30 minutes or until edges are set and start to pull away from the sides of the pan. Remove; cool in pan on a wire rack. Use foil to lift uncut brownie from pan; remove foil. Spoon Chocolate Frosting over brownie, spreading evenly. Let stand 10 minutes. In a small bowl stir together the powdered sugar, milk and vanilla until well-combined (icing will be thick). Add food coloring as desired. Pipe "note" onto brownie.
In a small saucepan bring whipping cream just to boiling. Remove from heat. Add chocolate. Let stand 5 minutes. Whisk until smooth.
Love Note Icing
In a small bowl stir together powdered sugar, milk, and vanilla until combines. Add food coloring, if desires. Transfer to a piping bag.