Total Time
Prep 0 mins
Cook 10 mins

Enjoy and old-fashioned favorite. I have loved Knox blocks since I was a kid and was surprised to not see a recipe here. So I thought I would add one. For those who don't know what Knox Blocks are they are the original Jello Jigglers and I think a little more tasty.


  1. Heat the Four Cups of Water Until Boiling.
  2. Combine the Jello and Gelatin together in a bowl.
  3. Pour in the water.
  4. Stir until completely dissolved.
  5. Pour into a glass dish or pan.
  6. Put in refrigerator about 2 hours to cool and set.
  7. When set cut into squares.
  8. How many you get depends on how large you cut them. You can also use cookie cutters for shapes.
Most Helpful

I had always made these for my children and had originally found the recipe on a Jello box. I always forget the ratios so this is a Godsend. I still make these and have adults that have never tasted one. They all love them and want to make them for their grandchildren. This recipe has surely stood the test of time!

Janet P. September 20, 2015

I'm putting this in my recipe box (as I always have to look up the Knox to gelatin ratio when I make them). My only change is to make a small batch. 1 envelope of Knox is 3 tsp; so I use one small box of gelatin and 1 envelope plus 1 tsp of Knox.

El Bee December 20, 2014

KNOX BLOCKS! I completely forgot about these! I grew up eating them also, and I used to love them! Thanks for posting the recipe. UPDATE- I finally made these and they tasted exactly as I remembered. It was fun to introduce them to my kids, who gobbled them up. I do keep them covered as they chill, and it takes away the hard outer "peel" that you get sometimes.

Retro Kali May 29, 2013