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

5 5

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.

5 5

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.

5 5

My toddler thanks you. . .he loved jello, but doesn't love that it slides off the fork. PROBLEM SOLVED. Knox blocks are firm and he can pick them up and pop them in his mouth. I will literally be making this recipe weekly!!! Thanks UPDATE: I have made this many a time. I use sugar free jello (the off brand from Walmart) which works out great. I also cut them into different shapes with mini cookie cutters and send them in my son's lunch in a baggie and they hold up very well.