It is known by both names. There are many ways to make it. Some use sour cream or yogurt, but this one is made with Sweetened Condensed Milk and Knox. Personally, it's my favorite. For Easter I made these "personal" Rainbow Jell-O Cups. My kids are excited and can't wait to eat them tomorrow!
4 - 3oz boxes of any flavor Jell-O.
4 C Boiling Water
4 Envelopes (total) of Knox Gelatin
1 can Sweetened Condensed Milk
1 1/2 C Boiling Water
1/2 C Cold Water
4 Envelopes Knox Gelatin
Prepare 9x13 pan or mold by spraying lightly with cooking spray. Wipe out with paper towel as you only want a very little bit of oil and yet it needs to be evenly disbursed.
Start with a rainbow/colored layer. In small mixing bowl mix 1 pkg Jell-O with 1 envelope Knox. Slowly pour in 1 C boiling water and stir for about 2 minutes or until dissolved completely. Pour into pan and refrigerate 15 minutes. Meanwhile, mix up White (milk) layer:
In larger mixing bowl mix together 4 envelopes of Knox with 1/2 C cold water. Stir slightly to moisten; let set. Pour 1 1/2 C Boiling Water over mixture and slowly whisk. Add 1 can sweetened condensed milk and stir well. Slowly pour 1 C Milk Mixture over the 1st rainbow layer. Refrigerate 15 minutes.
Repeat process, alternating between colored and white layers, making sure to refrigerate 15 minutes in between.
Note: If the milk mixture thickens up while waiting for the Rainbow layers to set, place in the microwave 20 seconds or so until it "melts" again. Whisk to smooth it out.
*If you plan to do more than 7 layers (as I did here), plan to double the White Mixture.