Description

These Key Lime Pie Marshmallows are fluffy, sweet, and tangy bites of citrusy heaven! Made with fresh key lime juice and zest, then finished with a graham cracker crumb coating, they’re like mini key lime pies in marshmallow form. Perfect for snacking, gifting, or adding a twist to s’mores, these homemade marshmallows are a fun, zesty treat everyone will love.

Ingredients

For the Marshmallows:

3 envelopes unflavored gelatin

1/2 cup cold water (for blooming gelatin)

1 1/2 cups granulated sugar

1 cup light corn syrup

1/4 cup water

1/4 teaspoon salt

1/4 cup key lime juice

1 tablespoon key lime zest

1/2 teaspoon vanilla extract

Green food coloring (optional)

For the Coating:

1/2 cup powdered sugar

1/2 cup crushed graham crackers

2 tablespoons cornstarch

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Instructions

Prep the Pan: Lightly grease a 9×13-inch baking pan and line with parchment paper.
Bloom the Gelatin: In the bowl of a stand mixer, add gelatin and 1/2 cup cold water. Let sit for 10 minutes.
Make the Syrup: In a saucepan, combine sugar, corn syrup, and 1/4 cup water. Stir over medium heat until sugar dissolves. Increase heat, bring to a boil, and cook without stirring until mixture reaches 240°F (115°C).
Whip the Marshmallows: With mixer on low, slowly pour the hot syrup into the gelatin. Increase to high speed and whip for 10–12 minutes, until thick, white, and fluffy.
Flavor It: Add salt, key lime juice, zest, vanilla, and optional food coloring. Mix just until combined.
Set the Marshmallows: Pour the mixture into the prepared pan and smooth the top. Let sit uncovered for at least 4 hours or overnight.
Coat and Cut: Mix powdered sugar, crushed graham crackers, and cornstarch. Dust a cutting board with some coating, invert marshmallows, peel off parchment, cut into squares, and toss in coating.
Store: Keep in an airtight container at room temperature.

Notes

For stronger lime flavor, add a touch more zest or a splash of lime extract.

These marshmallows make excellent gifts—wrap them in parchment or place in treat bags.

Use a sharp knife dusted with coating to get clean cuts.

Try torching them slightly for a s’mores-inspired twist!

Prep Time: 30 minutes
Cook Time: 10 minutes
Category: Dessert, Candy
Method: Whipping, Stovetop
Cuisine: American