Key Lime Pie Marshmallows
These no-bake dessert treats are just bursting with bright citrus flavor! Just like your favorite summer slice of key lime pie, in marshmallow form!
Oh my word you guys! Please don’t burst my bubble and tell me this has been done before because I am beaming with pride right now!
Please give a warm welcome to the newest member of the Baking a Moment family:
Key Lime Pie Marshmallows!
Dude. These are seriously insane. The flavor is like a punch in the mouth (but in a good way)! And they were a snap to make. Seriously! I whipped ’em up in between washing the dinner dishes and taking the kiddos up for their bath. Like, 15 minutes, I’m telling ya!
But I was actually not so sure if my key lime idea was going to work, so I only made a half batch. I used my nifty loaf pan, which I am in love with, because of the square corners. Long story short, it worked beautifully, so I could have totally followed Martha’s recipe and had twice as many marshmallows. If you want a double batch, you’ll use a 9×9 pan 😉
I used bottled key lime juice so I could get that true key lime flavor, +fresh lime zest. But if you can get your hands on fresh key limes you should totally go for it! They are even more tart and flavorful than the regular kind.
At first, I was thinking of dusting them all in graham cracker crumbs to emphasize the key lime pie point. But then, I had some leftover toasted coconut laying around so I thought why not? And, as long as I’m making more than one kind, I may as well do a few with just powdered sugar, because you know my five-year old ain’t touchin’ no marshmallow with brown stuff on it.
#ridiculouslypickyeater
The flavor in these marshmallows will knock your socks off. They are just BURSTING with pucker-y citrus flavor! Such a fun summery treat!
Be sure to spritz a little non-stick spray on your knife before cutting them into squares; they’re super sticky! I used this kind of knife, which is sometimes called a bench knife, but is aka a dough scraper. It’s great for bars of all kinds, and it gets a ton of use around my kitchen!
They’re awesome just by themselves, but stay tuned for a fun twist on a classic, coming later this week!
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Key Lime Pie Marshmallows
Ingredients
- 1/3 cup (78.86 ml) key lime juice
- 1/2 ounce (14.17 g) plain gelatin, (2 envelopes)
- 1 1/2 cups (300 g) granulated sugar
- 2/3 cup (157.73 ml) light corn syrup
- 1/3 cup (78.86 ml) water
- 1/8 teaspoon kosher salt
- 1 teaspoon vanilla extract
- 1/4 cup (24 g) lime zest, (zest of 2 limes)
- 1/2 cup (42 g) graham cracker crumbs,, toasted coconut, or powdered sugar
Instructions
- Lightly mist a loaf pan with non-stick spray, and line with parchment.
- Place the key lime juice in a large mixing bowl, and sprinkle the powdered gelatin on top. Set aside and allow to soften.
- Combine the sugar, corn syrup, water, and salt in a medium saucepan, and set over medium-high heat. Allow the mixture to come to a boil, swirling the pot occasionally (do not stir). Attach a candy thermometer to the side of the pot, and keep the mixture at a low boil until it reaches 238 degrees F.
- Slowly and carefully pour the hot syrup over the key lime/gelatin mixture, while whipping at medium speed.
- Increase the speed to high and continue to whip until the marshmallow is stiff, glossy, and white.
- Stir in the vanilla extract and lime zest.
- Pour into the prepared pan and allow to set for 3 hours, or overnight.
- Turn the marshmallow out onto a cutting board, peel away the parchment, and use a sharp knife (misted with non-stick spray) to cut into 2-inch squares.
- Toss the marshmallows in graham cracker crumbs, toasted coconut, or powdered sugar, and enjoy!
Wow, those look amazing Allie!! I wish I could find key lime juice in Iowa. I actually looked last week because I wanted to make cookies, but no such luck. Now I am going to have to resort to ordering online, because these need to be made…soon!!
Hey Lisa! I wouldn’t hesitate to try these with regular lime juice. If it’s not too expensive, that is, with the lime shortage and all. But really, I think it would taste every bit as delicious! Thanks so much for the sweet compliments!
I really think these are a novelty, never seen anything like it.
Dark chocolate for me though with the toasted coconut, s’more style please!!!
Pinned!! It’s just that unique.
Thanks for pinning Laura! And I think they’d be fabulous with dark chocolate too 😉
These look gorgeous. I’m just drooling over your brilliant photos! I wish I could get corn syrup here 🙁 I need to make these.
I hope you’re able to find a source, Miss Messy! These were so much fun to make and I bet you could add all sorts of flavors too. Good luck!
What a lovely summery treat. I would love to try dipping these in white chocolate. I like this marshmallow recipe. It looks easier than most.
It was a snap, Laura! I’m so happy you liked it, and you know what? That is a stinkin’ brilliant idea. 😀 😀 😀
I’m pretty sure I rolled over off my chair when I saw these pop up on my news feed yesterday. I really think you’ve come up with a real winner here. I personally have never heard of such a thing! This is so creative, and crazy, and inspiring, and beautiful …. and I could just go on and on and on. Oh, and I am totally making these … possibly this afternoon! xoxo
That’s awesome, Justine! Have fun and enjoy! 😀
Homemade marshmallows are best, and these look perfect, Allie! I love that you flavored them with key lime, and the graham crumbs and toasted coconut coatings are a nice touch! I buy key limes weekly so I need to make some of these beauties. 🙂
I wish I could find fresh key limes!!!
Allie, These look great, I will definitely make some, especially if they can be roasted and toasted. I would like to make a suggestion though, I would suggest using fresh limes (key or “regular” Persian) over the bottled “Key West Lime Juice”, which is exactly what the bottle says. Concectrated Persian lime juice (confirmed on the ingredient list) which has been reconstituted, preserved and bottled in (guess where?) Key West. It makes no sense from a culinary perspective to purchase a processed version of what you can purchase at the local grocery store (high prices aside) fresh. After all, isn’t that the direction were trying to go with food? Cheers, looking forward to the finished pieces.
You are so right, Steve! I meant to say that in my post- to use fresh key limes if you can get your hands on them. Fresh is always best! Sadly they are unattainable in my neck of the woods 🙁 Thanks for the tip, though!
These are so cool and they sound really good!
Thanks Chloe! The flavor was just awesome!
Wow these are incredible Allie! I definitely haven’t seen key lime marshmallows before – such a brilliant idea and so creative! Drooling over how fluffy and light these pillowy guys look – pinned!
Thank you Kelly! I’m so glad it wasn’t old hat to you! I didn’t even want to google to see- that’s always such a downer when you get a fun idea. Thanks so much for the pin, and for the sweet comment!
WOW! I’m really impressed!! These looks ridiculously good! And it was so quick and easy to make. I wonder why I haven’t given this a try yet? This is really good, Allie! Pinning!
Thanks so much for pinning, Connie, and for the positive feedback! You should definitely give homemade marshmallows a try, I’m sure you’d knock ’em right outta the park!
Goodness, I think I just drooled!!!!! This recipe is ABSOLUTE genius!!!!! Key lime pie transformed into a cottony soft marshmallow!!!??? I would pin this a MILLION times, if I could! For now, pinning! 😉 <3 *-*
Thank you, Samina! For the pin and for the nice comment! You’re always so sweet- <3
Woah those sound amazing! I haven’t even gotten around to making homemade regular marshmallows much less key lime pie flavored. 🙂 They sound awesome though, great photos too! 😀
Thanks, How to! I was pleased with the pics but Foodgawker didn’t like them, boo. 🙁 Thanks for commenting!
Wow! Ive never made marshmallows at home before but I’m so tempted now!! Beautiful!
Oh you’ve got to give it a try sometime! They were so fun and easy to make. I’m thinking you could probably add in all sorts of flavors! Thanks, Jessica 😀
*holds fingers in ears* la la la la… don’t tell me these bad boys have been overly done as I’m planning on making them too… la la la! 😆
But oh yes, I absolutely A.D.O.R.E. homemade marshmallows and key lime ones rolled in toasted coconut – hell yes! Little pillows of freshness.
I love that you used actual key lime juice in these too as we can’t get key limes here, just regular ones. I know they’d do the job, just not as packed full of tart flavour as the key limes are.
I know- I can never find the *real* key limes either, hence the bottled juice. I know it’s probably not nearly as good as fresh, but the flavor was still pretty awesome! Hope you enjoy, Lisa, and thanks for the sweet comment!
What an awesome idea, LOVE the flavors and can;t believe how easy these are to make. My kids will love them!
Oh ya, total kid food! Hope you enjoy 😀
Gorgeous girl! I love your creativeness.
Hope your week is off to a fantastic start!
Thanks Melanie! So happy you liked, and hope your week is great too! <3
Allie!!! LOVE these so much!! these are brilliant. . I’ve personally never seen key lime marshmallows. . love!!! these would be great at a casual dinner party or when we’re entertaining in the summer. . love how inventive these are!!
Thanks sweetie! Hope you’re feeling a little better today 🙂
Allie, all I can say is: !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!! (times infinity :). These are so beautiful. Also, key lime is my fave and I cannot wait to try these in s’more form! Maybe with some white chocolate in lieu of milk chocolate.
Girl you just read my mind 😉
Okay, I am not even a key lime fan, but these photos are drool worthy. Seriously! I do love homemade marshmallows and I usually make a batch for Christmas to give as food gifts. Great styling as well..your blog as quickly become a favorite of mine. 🙂
Thanks so much, Tiffany! And that’s such a great idea to give them as gifts 😉
Are you serious?! You were able to whip these up in-between dishes and bathtime?! That’s because you are a total boss, Allie. If it were me, I’d be fumbling ‘n cursing ‘n unable to make these without at least an hour, lol. These look incredible! So fluffy ‘n light ‘n soft and sooooo much better than mass produced. And hello – key lime?! I love it! There have been so many homemade marshmallow recipes floating out there in the blogosphere lately that I’m dying to make them myself. Can’t wait to try this recipe!
You are going to love it, Nancy! And I promise you won’t be fumbling and cursing! They are a snap- just keep your eye on the thermometer and you’ll be awesome! Enjoy!