Patriotic Jell-O Squares

In a medium heat-safe bowl or large measuring cup, add 1 envelope of unflavored gelatin and ¼ cup cold water. Stir to moisten, let soak for 3 minutes, then add the blue Jell-O powder and immediately pour in 2½ cups boiling water. Stir until completely dissolved, then cool to room temperature. Coat a 9x13-inch baking dish with nonstick spray and place flat/level in the fridge. Stir Jell-O mixture once more, scraping bottom, then pour it into the dish.

In a medium heat-safe bowl or large measuring cup, add 2 envelopes of unflavored gelatin and ½ cup cold water, stirring to moisten. Let soak 5 minutes, then stir in 1 cup boiling water until fully dissolved. In a separate bowl, mix condensed milk with 1 cup boiling water, then mix into unflavored gelatin. Stir to combine, then cool to room temperature, stirring once more. When the blue layer is set, stir the milk mixture once more and pour it on top of the blue layer.

In a medium heat-safe bowl or large measuring cup, add 1 envelope of unflavored gelatin and ¼ cup cold water. Stir to moisten; let soak for 3 minutes. Add the red Jell-O powder and immediately pour in 2½ cups boiling water. Stir until completely dissolved, then cool to room temperature. When the milk layer is set, stir the red mixture once more, then pour it over the top of the white layer. Chill 4 hours until fully set. With a long, thin knife, slice into squares (5 cuts on 13-inch side, 3 cuts on 9-inch side for 24 pieces) and arrange on a serving platter.