My friend saw these and said, 'those are the kind of treats you always see and pin, but never actually make'.
These are jigglers, so they are perfect finger food for appetizers, hors d'oeuvres, parties etc. as they hold their shape and don't need utensils.
Be warned - they take a long time. Plan between 2.5 - 3 hours.
I multi tasked cleaning my kitchen, made a batch of cookies for tomorrow's dinner, and listened to a book on tape while I made these, waiting for them to set.
Because I knew I'd be making many layers - I used my largest pan. My trusty 10x15 inch cake pan. Whatever mold you use, it just needs to be able to hold a large volume. (I did see something similar done in a bundtcake pan with frilly edges)
You can layer the jello colors anyway that you'd like - I followed the ROYGBIV rainbow pattern. Red, Orange, Yellow, Green, Blue, Indigo (skipped that one), Violet.
I originally saw a version of this on the Pioneer Woman, and added the rainbow twist.
Here's what's needed.
12 packets of unflavored gelatin
6 small boxes of jello - colors and flavors of your choice
3 cans of sweetened condensed milk
Boiling water (an electric tea kettle is a dream)
Prepare 10x15" pan by lightly spraying with cooking spray, then gently wiping off to remove excess residue.
If you are going in rainbow order, do ROYGBIV backwards so that the violet (purple) will be on the bottom. Start with grape jello for the first layer.
Here is the order: Purple, Blue, Green, Yellow, Orange, Red
In a small bowl, mix 1 packet of unflavored gelatin with 1/4 cup of water.
Add 1 cup of boiling water and mix.
Add 1 box of jello. Gently stir until dissolved.
Pour into pan, and place in fridge to cool - until set. Approximately 15 minutes.
While it cools, make the filling layer.
Mix 2 unflavored gelatin packets with 1/2 cup cold water in a small bowl.
Mix one can of sweetened condensed milk with 1 cup boiling water.
Add gelatin mixture to the milk and water, then add another 1/2 cup of boiling water.
(Depending on how thick you want your filling, you can use this for two or three layers. Don't make it all at the same time though, as it may begin to set as it cools on the counter)
One the jello has set, remove from refrigerator, and pour 1/3 to 1/2 of the filling mixture over the first layer. Return to the fridge to cool and set.
Repeat layering jello and filling as desired.
Cover with plastic wrap, and place in fridge for several hours or overnight.
Cut into 1"x 2" cubes, or cookie cutters, and keep refrigerated unless serving.