2.25 ounceKnox packets of unflavored gelatin(.5 ounces total)
For each flavor, dissolve one box of Jello in 2 cups of boiling water. Pour into two separate 9x13" pans and chill for at least 3 hours, or overnight.
After chilling the flavors, cut them into small squares. Mix both colors of Jello squares in one 9x13" pan. In a separate bowl, sprinkle 2 envelopes of unflavored gelatin into 1/2 cup cold water. Let the gelatin expand in the water for a few minutes, then add 1 1/2 cups boiling water and whisk together until the unflavored gelatin dissolves.
Mix in the can of sweetened condensed milk, stir and let cool at room temperature. Once the milk mixture has cooled, pour over Jello squares in the 9x13" pan. Chill for a few hours until set up. Cut into blocks or shapes and serve. These sweet treats are one of the best patriotic desserts!
(Quick tip: create a new layer by adding cool whip and fresh fruit to this delicious July dessert! This is a tasty way to improve your layered jello salad!)