sugar free Jello works just fine.
Novice-for-Now....great tip on freezing the evaporated (not condensed) milk. I prefer regular evaporated milk but 2% will work.

I had no idea the recipe started in the 50's - sheesh...this recipe is as old as I am

I am quite health conscious person so i always try my best to eat healthy and pure stuff.I have found that if you actually freeze the condensed milk until there are ice crystals, you will get a fluffier product when it is whipped.

Our family used this recipe with lime jello, lime juice, and crushed Oreo cookies. We called it "Tootie's Green Stuff". Not as fancy as "Lemon Fluff" for a name, but just as tasty.

Sounds yummy! I'll have to try it!