Chocolate Knox Blox: Get the retro recipe for these gelatin dessert squares

Chocolate Knox Blox Get the retro recipe

Note: This article may feature affiliate links, and purchases made may earn us a commission at no extra cost to you. Find out more here.


Choc up a winner – chocolate Knox Blox. (1976)

Your kids’ll love delicious Chocolate Knox Blox made with Knox unflavored gelatine. And so will you. They’re so easy to fix. If you can heat water, you can make Knox Blox in no time at all.

And they’re different. Kids can eat these firmed-up, chocolate gelatine snacks with their fingers. Chocolate Knox Blox make great TV-time treats, after-school snacks or holiday surprises. So make up a batch of Chocolate Knox Blox and choc up a winner at your house!

Knox Blox. A different kind of snack.

Chocolate Knox Blox Get the retro recipe

Chocolate Knox Blox

Yield: 64 one-inch squares
Prep Time: 5 minutes
Cook Time: 5 minutes
Additional Time: 2 hours
Total Time: 2 hours 10 minutes


  • 1/2 cup sugar
  • 1-1/2 cups semi-sweet chocolate chips (12 ounces)
  • 4 envelopes Knox Unflavored Gelatine
  • 1-1/2 cups cold water


  1. In a medium saucepan, combine all ingredients.
  2. Stir constantly over low heat for 5 minutes or until the chocolate is melted*.
  3. Pour into a 8 or 9-inch square pan and chill until firm.
  4. To serve, cut into 1-inch squares.


* For special occasion variations, stir in 1/2 cup of any of the following: chopped nuts, raisins, marshmallow creme, or chopped maraschino cherries.

Recommended Products

As an Amazon Associate and member of other affiliate programs, qualifying purchases made via our links earns us a small commission at no additional cost to you.

Nutrition Information:
Yield: 64 Serving Size: 1
Amount Per Serving: Calories: 32Total Fat: 2gSaturated Fat: 1gTrans Fat: 0gUnsaturated Fat: 1gCholesterol: 0mgSodium: 1mgCarbohydrates: 5gFiber: 0gSugar: 5gProtein: 0g

Click Americana offers approximate nutrition information as a general reference only, and we make no warranties regarding its accuracy. Please make any necessary calculations based on the actual ingredients used in your recipe, and consult with a qualified healthcare professional if you have dietary concerns.

Vintage Chocolate Knox Blox recipe

Get the famous Can't Fail 5-minute fudge recipe, plus 10 more fast vintage fudge recipes

PS: If you liked this article, please share it! You can also get our free newsletter, follow us on Facebook & Pinterest. Thanks for visiting and for supporting a small business! 🤩 


You might also like...

The fun never ends:

Comments on this story

4 Responses

  1. Hi, is the texture become like jell-o or hard like block? your reply is much appreciated and tq in advance

  2. These are so good and it firms up very quickly. They have the texture of soft fudge and I add 1/2 cup of cut up marshmallows.

  3. I tried it with four packets of gelatine. It was firm and fudgy-like. I then tried it with two packets of gelatine and it was more jiggly like jell-o, still able to hold up really well if using a mold.

  4. I’m liking this idea of 2 packets Then, raspberry Jell-O w/ berries and chocolate again, w/ Cool whip. Nummy in a ring mold.

Leave a comment here!

Your email address will not be published. Required fields are marked *

This site uses Akismet to reduce spam. Learn how your comment data is processed.

Skip to Recipe