Learn How to Make a Colorful Stained Glass Cake


This summer our family has been binge watching That 70’s Show and loving every groovy minute of it. Being a child of the 70’s, it’s been a blast to be immersed in a program that so accurately captures the era… the colorful plastic decor, the over the top pattern mixing, the absence of computer/electronic devices! It ALL takes me back.

As we get ready to watch the finale, a stained glass Jell-o cake seemed like the perfect way to celebrate…. Because nothing says the 70’s like Jell-o.

How to Make a Colorful Stained Glass Cake

As innovative as this dessert is, it’s also surprisingly easy to make. Here’s what you’ll need:

Supplies for Stained Glass Jell-o Cake

**This post contains affiliate links. Many of the supplies listed can be found at your local grocery store, but the links have been provide for your convenience in recreating this project.**

Learn How to Make a Colorful Stained Glass Cake

Method for Stained Glass Jell-o Cake

Prepare Jell-o

When my family heard that I would be making this “cake” they all quickly weighed on which flavors they wanted in it. The requests included lemon, lime, and grape.

I was shocked there were no red flavor selections too.

After enjoying this dessert, they all agreed that lemon and lime are very similar so trading one out for a cherry or orange would be a better option. 

Learn How to Make a Colorful Stained Glass Cake

Prepare each flavored Jell-o by diluting the powdered gelatin in 2 cups of boiling water. Once the gelatin is dissolved, pour mixture into a lightly greased, shallow baking dish. I wasn’t concerned about using all of the same size baking dishes as the Jell-o squares will end up being various sizes.

Once the Jell-o is prepared, place in the refrigerator to set-up for 2 hours.

Make the “Cake”

To make the white “cake” portion, you’ll combine the unflavored gelatin and sweetened condensed milk.

Learn How to Make a Colorful Stained Glass Cake

To do this, dissolve unflavored gelatin in one cup of cold water. Then add 3 cups of boiling water and sweetened condensed milk. Once combined, allow mixture to sit and come to room temperature.

Create the Crust

Before goldfish crackers were the go-to kid snack, we enjoyed graham crackers. And because no matter how many s’mores we make, our family ALWAYS seems to have plenty of graham crackers leftover, I opted for a graham cracker cookie crust.

Crush two of the graham cracker packs (there are typically 3 packs in a box) and mix with one stick of melted butter.

Learn How to Make a Colorful Stained Glass Cake

Once combined, press into the bottom of a 9×12 baking pan and freeze for 10 minutes.

Learn How to Make a Colorful Stained Glass Cake

Assemble Colorful Stained Glass Cake

Cut set Jell-o into squares and sprinkle over the graham cracker crust.

Learn How to Make a Colorful Stained Glass Cake

This doesn’t have to be perfect. Just add squares to the crust until you get a good amount of coverage.

Learn How to Make a Colorful Stained Glass Cake

Then pour the “cake batter” (gelatin/sweetened condensed milk mixture) over the gelatin squares and crust.

Learn How to Make a Colorful Stained Glass Cake

Once you’ve poured out the entire mixture, you can add additional Jell-o squares if you think it needs a little more. The more squares you have, the more colorful the cake.

Learn How to Make a Colorful Stained Glass Cake

Allow to thoroughly set in your refrigerator for 4 hours.

Don’t Forget the Frosting

What’s a cake without some frosting?! However, if you grew-up in the 70’s then you know that there’s no dessert topping quite like Cool Whip… especially when it comes to Jell-o desserts.

Once your cake is set, frost a layer of Cool Whip over your sheet cake and slice for a groovy “That 70’s Show” treat.

Learn How to Make a Colorful Stained Glass Cake

The family absolutely loved this truly unique treat and are looking forward to me adding it to my regular dessert recipes rotation.

Learn How to Make a Colorful Stained Glass Cake

It’s amazing that you can pick out each of the distinct Jell-o flavors, but they all work together too.

Learn How to Make a Colorful Stained Glass Cake

We were all surprised at how durable the cake is. I think because the squares are “floating” in a white base, my brain thinks pudding which would cause everything to fall apart. However, the Jell-o held it’s form and makes for a truly pretty dish.

Learn How to Make a Colorful Stained Glass Cake

What is your favorite decade? Have you made a stained glass cake before? What are you binge watching right now? We are looking for our next show, so drop your suggestions in the comments below.