Jello Fondant

How to make delicious Jello Fondant. from #DietersDownfall.comMermaid Inspired Cake – Day Two – Jello Fondant

There are two very special little girls that celebrated a mermaid pool party last week. Their mom asked me to make an intricate fondant mermaid and there was no way that I could do that. No. Way!

Kneading Fondant may be a tough job, but it's worth the work. from #DietersDownfall.comI talked her out of an elaborately decorated cake that I could in no way deliver in favor of a more simple design.

Then I came across this tutorial on Instructables and thought it would be perfect for the cake.

We decided on lime green and berry blue for the colors and I went with it.

Lime Jello Fondant and Berry Fondant with tools to make mermaid scales. from #DietersDownfall.comThe jello flavored and colored the marshmallow fondant beautifully. I love how this turned out! It’s easy to make and it was yummy to eat.

Jello Fondant

Prep time: 

This easy marshmallow fondant is flavored and colored with jello.
  • 1 (10 oz) bag of mini marshmallows
  • 1 (3 oz) box of jello
  • 2 tablespoons water
  • 1 pound powdered sugar
  • shortening
  1. Place the marshmallows, jello and water into a glass bowl. Microwave for 30 seconds at 50% power and stir. Microwave again and stir completely.
  2. Gradually add in ¼ of the powdered sugar and give it a good stir. It will be thick and sticky, but keep stirring. Add in a bit more sugar and when it gets too thick to stir, then transfer it to a silicon mat that's coated in shortening.
  3. Knead more sugar in until it no longer sticks to your hands. You may not use all of the sugar or you may need to add a bit more sugar, it all depends on how thick you want your fondant.
  4. Once it's at a thickness and consistency of play-doh, it's done.
  5. To store your fondant, add some shortening to your hands and rub it over the fondant, wrap it with plastic wrap and then place it into a sealed bag, preferably one with a vacuum seal. Let your fondant sit overnight.
Recipe from Instructables


  1. Awesome! I’ve never seen fondant made like this. Can’t wait to try. Pinning to remember.

  2. After I cover the cake in fondant, will I be able to make little decor pieces to stick to the fondant covering the cake…maybe just add a tiny bit of water to make it stick?

    • Karyn Granrud Karyn Granrud says:

      If you google “Fondant Glue” there are a few different ways that you can adhere decorations to the fondant. I hope that helps.

  3. Excited to try this out! I bet the hello gives it a wonderful taste! Pinning

    • Karyn Granrud Karyn Granrud says:

      Yes, the flavor was light and not over powering. I bet a lemon cake and lime fondant would be great together!

  4. debbie copa says:

    how long can the fondant pieces be stored after making them.

    • Karyn Granrud Karyn Granrud says:

      I generally have kept the fondant whole for a day and then used the pieces when they were cut. Then I’ve left them on the cake for another day or two. The marshmallow fondant doesn’t get hard, but it will dry out and get brittle.


  1. Link Party! says:

    […] Jello Fondant by Dieters Downfall […]

What do you think?