Glass Jello - Spring Edition

I found this creative, festive, and beautiful goody on the site Our Best Bites and it is called glass Jell-O.  What a fun treat to bring to a party and have all the guest "oh and ah" over!! 

Glass Block Holiday Jello
 
4 3-oz. packages assorted Jello (spring colors)
2 packets unflavored gelatin
1 14-oz. can sweetened condensed milk

Spray 4 small food storage containers (like Tupperware/Gladware/Rubbermaid) with non-stick cooking spray (make sure it is plastic and not glass because the Jello-O sticks to glass and gets all tough around the edges).  Set aside.

Bring 5+ cups of water to a boil. Combine 1 c. boiling water with 1 package of Jello, stirring until dissolved. Place the dissolved Jello in one of the prepared containers. Repeat with the remaining packages of Jello. Refrigerate for at least 4 hours, preferable overnight.

When the Jello has set, bring another 1 1/2 c. of water to a boil. While the water is heating, sprinkle 2 packets of unflavored gelatin over 1/2 c. of cold water. Allow to stand for about 4 minutes.

When the water is boiling, pour 1 1/2 c. boiling water over the dissolved gelatin and stir to combine. Add the sweetened condensed milk and mix well. Allow to come to room temperature.

Lightly spray a 9×13″ pan with non-stick cooking spray. Carefully cut the colored Jello into cubes and gently toss to combine in the 9×13″ pan. Pour the cooled milk mixture over the colored Jello and, if necessary, rearrange some of the colored Jello to make sure it is evenly distributed and not sticking out of the white mixture too far.

Place the 9×13″ pan in the refrigerator and chill overnight. Cut into squares, rectangles, or various shapes with cookie cutters and serve.