4th of July jello

i had several requests for my 4th of July jello recipe, so here it is! the white layer is cool and creamy and perfect for a hot 4th of July day. yum! i make this every year and it is always a hit.

Red, White, and Blue Jello 
2- 3 oz packages of blue jello
4 cups boiling water, divided
4 1/2 cups cold water, divided
1 cup fresh blueberries
1 envelope unflavored gelatin
1 cup milk
2/3 cup sugar
2 cups (16oz) sour cream
1 teaspoon vanilla
2- 3oz packages of strawberry jello
1 cup fresh strawberries, hulled and sliced
cool whip, room temperature

In a trifle bowl, dissolve strawberry jello in 2 cups boiling water. Stir in 2 cups cold water. Add strawberries, save a few to garnish the top with later. Refrigerate until firm. {2-3 hours} *Do not start the next layer if the layer below is not firm.*

In a sauce pan, sprinkle unflavored gelatin over 1/2 cup cold water; let stand for 1 minute. Add the milk and sugar; cook and stir over medium heat until gelatin and sugar are dissolved. Cool to room temperature. Whisk in sour cream and vanillla. Spoon over strawberry jello and refrigerate until firm. {about 1-2 hours}

In a medium bowl, dissolve blue jello in 2 cups of boiling water; stir in 2 cups of cold water. Add blueberries, reserving a few for the top. Spoon over white layer. Chill until set. {3-4 hours} Garnish with cool whip and the reserved berries.

*note, I like to start this recipe 1-2 days before I plan to serve it allow enough chill time for each layer. That way I'm not chained to the kitchen for hours waiting for each layer to chill. For example: I planned to serve this Saturday afternoon this year, so I started it Thursday night by doing the first layer. I then did the second layer Friday morning and the 3rd layer Friday night. Then on Saturday I garnished the top.*