The iconic, crunchy, colorful bits found in a box of Lucky Charms are arguably the most sought-after component of any breakfast cereal. Known technically as marbits, these dehydrated marshmallows have a unique texture that sets them apart from the soft, pillowy marshmallows we roast over campfires. While you can certainly buy bulk bags of “cereal marshmallows” online, there is a distinct satisfaction in crafting them yourself. Learning how to make Lucky Charms marshmallows allows you to customize the shapes, flavors, and colors to your heart’s content, ensuring your morning bowl of cereal is exactly as “magically delicious” as you want it to be.
Understanding the Magic of the Marbit
To successfully recreate these treats, you first have to understand what makes them different from standard marshmallows. A regular marshmallow is aerated and contains a high moisture content, giving it that bouncy, squishy feel. A Lucky Charms marshmallow is essentially a regular marshmallow that has been stabilized with extra gelatin or cornstarch and then undergoes a dehydration process to remove almost all its water content. This results in that signature “snap” and the way they melt almost instantly when they hit cold milk.
Essential Ingredients and Tools
Before you begin the process, you need to gather specific ingredients. Because we are aiming for a stable foam that can be piped into small shapes, the ratios are slightly different than a standard marshmallow recipe.
The Ingredient List
- Granulated Sugar: This provides the sweetness and the structure.
- Light Corn Syrup: This prevents the sugar from crystallizing, ensuring a smooth texture.
- Gelatin Powder: This is the setting agent. For extra-firm cereal marshmallows, some bakers prefer using a slightly higher ratio of gelatin.
- Cold Water: You will need this to bloom the gelatin and to create the sugar syrup.
- Vanilla Extract: For that classic marshmallow flavor, though you can use almond or peppermint for a twist.
- Food Coloring: Gel colors are highly recommended over liquid colors. They provide vibrant hues without thinning out the marshmallow mixture.
- Cornstarch and Powdered Sugar: A 50/50 mix of these is essential for dusting your surfaces and preventing the marshmallows from sticking to everything.
Necessary Equipment
- Stand Mixer: Making marshmallows involves a lot of high-speed whipping. A handheld mixer can work, but your arms will definitely feel the workout.
- Candy Thermometer: Precision is key. You need to hit a specific temperature to ensure the sugar syrup is at the “soft ball” stage.
- Piping Bags and Small Tips: To get those classic clover, heart, and moon shapes, you will need fine control over the mixture.
- Dehydrator or Oven: This is the most critical tool for achieving the crunch.
- Parchment Paper: To pipe your shapes onto.
Step by Step Process for Homemade Cereal Marshmallows
Making these is a two-part process: first, you create the marshmallow batter, and second, you dry them out.
Preparing the Gelatin
Start by blooming your gelatin. Sprinkle the gelatin powder over half of your cold water in the bowl of your stand mixer. Let it sit for about 10 minutes. This process allows the gelatin granules to absorb the liquid, ensuring they dissolve smoothly when the hot syrup is added later.
Boiling the Syrup
In a medium saucepan, combine the remaining water, granulated sugar, and corn syrup. Place the pan over medium heat and stir until the sugar dissolves. Once it begins to boil, stop stirring. Attach your candy thermometer to the side of the pan. You want to cook the mixture until it reaches 240 degrees Fahrenheit. This is known as the soft-ball stage. If you go too low, the marshmallows won’t set; if you go too high, they will become tough and rubbery.
Whipping the Mixture
Once the syrup reaches 240 degrees Fahrenheit, turn your stand mixer on low. Slowly pour the hot syrup down the side of the bowl into the bloomed gelatin. Once all the syrup is added, increase the speed to medium-high. Whip the mixture for about 10 to 12 minutes. You are looking for the bowl to feel lukewarm to the touch and the mixture to become thick, white, and glossy. This is the point where you add your vanilla extract.
Coloring and Piping
This is where the creativity starts. Divide the marshmallow fluff into several small bowls. Add a drop of gel food coloring to each bowl and fold it in quickly. You have to work fast because as the marshmallow cools, it begins to set and becomes harder to pipe.
Transfer the colored fluff into piping bags fitted with small round tips. On sheets of parchment paper lightly dusted with your cornstarch and powdered sugar mixture, pipe out small hearts, stars, horseshoes, and clovers. Keep them small—about the size of a pea or a fingernail—as they are easier to dehydrate when they are tiny.
The Secret to the Crunch: Dehydration
If you stop now, you have delicious, soft mini-marshmallows. To get the Lucky Charms experience, you must remove the moisture.
Using a Dehydrator
If you own a food dehydrator, this is the most effective method. Place the parchment sheets with your piped shapes onto the dehydrator trays. Set the machine to a low temperature, around 120 degrees Fahrenheit to 135 degrees Fahrenheit. Let them dry for 6 to 10 hours. The time depends on the humidity in your home and the size of your shapes. They are done when they are brittle and snap easily when bitten.
Using an Oven
If you don’t have a dehydrator, your oven can do the trick. Set your oven to the lowest possible setting. For many ovens, this is 170 degrees Fahrenheit. Place the trays inside and propping the door open slightly with a wooden spoon to allow moisture to escape. Check them every hour. You want to “dry” them, not “bake” them. If they start to melt or brown, the temperature is too high.
Storage and Serving Suggestions
Once your marshmallows are completely dry and crunchy, let them cool to room temperature. Toss them in a bowl with a little extra cornstarch and powdered sugar to ensure they don’t stick together, then sift off the excess powder. Store them in an airtight container or a glass jar. They will stay crunchy for several weeks as long as no moisture gets into the container.
You can add these to your favorite plain toasted oat cereal to recreate the classic breakfast, or get creative. Use them as a topping for hot cocoa, fold them into rice cereal treats for “double marshmallow” squares, or even use them as a whimsical garnish for sugar cookies and cupcakes.
Troubleshooting Common Issues
Marshmallows still chewy after 10 hours of drying: They likely need more time or the environment is too humid. Put them back in the dehydrator.
Shapes blurred together when piped: The mixture was likely too warm or over-whipped. Practice makes perfect when it comes to the timing of the “set.”
Marshmallows taste “starchy”: You likely used too much dusting powder. A light sifting after they are dried usually solves this.
Marshmallow foam breaking down / flat shapes: Ensure you are using gel colors; liquid food coloring can break down the structure of the marshmallow foam, leading to flat shapes that don’t hold their detail.
Frequently Asked Questions
Can I make these without a candy thermometer?
It is highly discouraged. While you can use the “cold water test” to check for the soft-ball stage by dropping a bit of syrup into cold water to see if it forms a ball, the margin for error is very slim. A candy thermometer ensures consistency, which is vital for the dehydration process to work correctly.
Why are my homemade marshmallows turning brown in the oven?
This happens when the oven temperature is too high. The sugar in the marshmallows begins to caramelize. If your oven doesn’t go below 170 degrees Fahrenheit, try turning the oven on for 10 minutes, then turning it off and letting the trays sit in the residual heat with the door cracked. Repeat this process until they are dry.
Is it possible to make vegan Lucky Charms marshmallows?
Yes, but you will need to replace the gelatin with agar-agar. Agar-agar has different setting properties and usually results in a firmer, more brittle texture, which actually works quite well for dehydrated cereal marshmallows. You will need to find a specific vegan marshmallow recipe to ensure the ratios are correct.
Can I use this recipe to make giant marshmallows?
You can, but they will not dehydrate into the crunchy “marbit” texture easily. The thicker the marshmallow, the longer it takes for the center to dry out. If you want giant marshmallows, it is better to enjoy them soft and fresh rather than trying to turn them into giant crunchy charms.
Why did my marshmallows get sticky after I stored them?
This is usually due to humidity. Marshmallows are hygroscopic, meaning they absorb moisture from the air. If the container wasn’t perfectly airtight or if you live in a very humid climate, they will soften. You can often save them by putting them back in the dehydrator for an hour to crisp them back up.