Put those conversation hearts to good use this Valentine's Day by baking Conversation Heart Cookies with Marshmallow Fluff. The fluff is sandwiched between two colorful candy confetti-packed sugar cookies and will instantly have you falling in love.
(This recipe for these Conversation Heart Cookies was originally published in January 2013, but has been updated with new photos and content in 2021)
In case you don't know by now, Valentine's Day season is one of my favorite parts of life. Mainly because there's so much prettiness around. And hearts and pink. It just makes me happy in this dead of winter. And conversation hearts fill my heart with joy. Sugary artificial joy.
I'm actually kind of surprised they don't have a better reputation. You know, why haven't celebrities started coming out with their own lines of conversation hearts?
Justin Bieber's could all be purple and say things like "baby, baby, baby, ohhh." and "never say never."
Taylor Swift could have a breakup anti-love conversation heart collection, featuring sayings like "bad blood" and "look what you made me do" (probs too long for a conversation heart, but whatevs). I think I just came up with a whole new business plan.
But for now, we'll do cookies. Conversation heart cookies.
❤️ Why You'll Love This Recipe
I realized that in an Internet search for "conversation heart cookies," you're going to find a lot of cookies that look just like conversation hearts (conversation heart sugar cookies). These aren't those. These cookies actually have conversation hearts IN them.
Honestly, I feel like people buy conversation hearts for fun, but rarely sit around eating them. That's why I made these Conversation Heart Cookies. Let's put those candies to work! And since you can't read them very well (why are they never legible?!), you may as well just crush them up and make confetti out of them. Done.
Plus? These cookies are delicious! They're basically nice thick sugar cookies with some fruity flavor from the crushed conversation hearts. I sandwiched marshmallow fluff in between them for an even sweeter treat.
The cookies have two components: the cookie and the marshmallow fluff filling, but the components for each are pretty simple. Here's what you need (see recipe card at bottom of post for ingredient amounts and full recipe instructions):
- Unsalted butter
- Granulated sugar
- Large eggs
- Vanilla extract
- All-purpose flour
- Baking powder
- Crushed conversation hearts
- Large conversation hearts (optional for pressing into cookies)
And here's what you need for the homemade marshmallow fluff (if you've never made your own, it's SO easy!):
- Large egg whites
- Light corn syrup
- Confectioners' sugar
- Vanilla extract
- Cream of tarter
🍪 How to Make Conversation Heart Cookies
Yes, you're going to crush conversation hearts up and mix them into your sugar cookie dough. Just trust me on this (I'll even give you a conversation heart that says "trust me.").
I recommend putting your candies in a sturdy plastic bag and placing a towel over and under the bag before crushing them. Hello, pretty candies, you are about to be demolished.
With a meat mallet. That was fun. And now we basically have conversation heart confetti.
Luckily, that's the most difficult part about making these Valentine's Day treats. The rest is easy peazy.
Just preheat oven to 350 degrees and line cookie sheet with parchment paper or a Silpat.
Cream sugar and butter together in a stand mixer with paddle attachment (or a large bowl with a hand mixer) until light and fluffy. Add eggs and vanilla and mix to combine.
In a separate large bowl, whisk together flour, baking powder, and salt. Stir in ½ cup crushed conversation hearts.
Slowly pour the dry ingredients into the wet ingredients, mixing on low all the time. Stop mixer when dough is just combined taking care not to over-mix.
Place rounded tablespoons of dough on parchment-lined baking sheet about 1 ½ inches apart.
This is so much easier than making heart-shaped cookies with dough that you have to roll out, use a heart cookie cutter on, and then carefully decorate with royal icing.
And bake for about 14 minutes, until edges are just starting to turn golden.
In addition to the crushed conversation hearts, I also pressed a large heart into each of my cookies when they were almost done baking (after about 10 minutes) for a little extra fun.
Let cookies rest on baking sheets for about 5 minutes before moving them to a wire rack to cool completely.
🧁 How to Make Marshmallow Fluff Filling
Even the fluff making is easy. Have you made your own fluff before? If not, you need to do it ASAP! Wait, do you even like fluff? Do you even know what fluff is or do you just call it marshmallow creme or something like that?
I'm from Massachusetts, so it will always be fluff to me and when I discovered how easy it is to make a few years ago, I never stopped.
I promise it really is ridiculously easy. All you do is beat egg whites, light corn syrup, and salt together on high for 4-5 minutes, until the mixture thickens quite a bit and turns bright white.
And then mix in confectioners' sugar, vanilla, and cream of tartar. And you'll never buy store-bought fluff again.
If you prefer to just make the conversation heart cookies and be done with it, that's your prerogative. But I recommending using two of the cookies to sandwich a layer of marshmallow fluff.
Then you can roll the cookie sandwich in more crushed conversation hearts, which makes it totally worth it.
100%. The added candy on top is also totally optional as the cookies look kind of pretty without it, too.
It's really all about that conversation heart confetti for these fun treats!
I actually never realized how fruity conversation hearts are until I made these conversation heart cookies. I think they're a little odd because they have a kind of powdery consistency, which makes them a not very ideal candy.
But crush them up and put them in sugar cookies and I'm all in.
Remember when conversation hearts got all tech-y back in 2007 or so? They had hearts that said "LOL" and "text me..." because let's be real, nobody really wants you to call them anymore.
Kind of makes you wonder what conversation hearts will be like in the years to come... I'm imaging "Alexa, turn out the lights." and "you got 10,000 steps" and "swipe right." Man, why has nobody put me in charge of conversation heart production yet? I'd be so good at it.
No offense, conversation heart people, but if a guy ever says "trust me" to me, I pretty much know I should be doing the opposite. And please don't call me "dear." Ugh.
⏲️ How to store
You can store these conversation heart cookies in an airtight container at room temperature for up to 5 days.
If you're going to turn them into sandwich cookies, I recommend keeping the fluff in the fridge and filling them right before serving.
💘 More Valentine's Day Dessert Recipes
In case you couldn't tell, I love all things conversation hearts, but really, all things Valentine's Day. Valentine's Day desserts are my absolute favorites and here are some of the best recipes:
- Valentine's Day Bark
- Red Velvet Pop Tarts
- Red Velvet Latte
- Red Velvet Cookie Dough Bars
- Very Berry Cheerios Marshmallow Treat Pops
- Sprinkles Strawberry Cupcakes
- Red Velvet Ice Cream with Cookie Dough
- Strawberry Soufflé
- Valentine's Day Spritz Cookies (from The Flour on My Face)
- Strawberry Tiramisu (from Inside the Rustic Kitchen)
I hope this easy recipe brings a little joy into your Valentine's Day. If you love the idea of conversation heart cookies, but don't want to get out the rolling pin, royal icing mix, piping bag, etc., this is the perfect recipe for you!
Do I have way too many feelings about conversation hearts? Should I stick to just crushing them up and making cookies out of them?
Conversation Heart Cookies with Marshmallow Fluff
- ½ cup (1 stick) unsalted butter, room temperature
- ¾ cup granulated sugar
- 2 large eggs
- 2 tsp vanilla extract
- 1 ⅔ cups all-purpose flour
- 1 ½ tsp baking powder
- ¼ tsp salt
- 1 cup crushed conversation hearts, divided
- Large conversation hearts, optional for pressing into cookies
- ½ cup marshmallow fluff (recipe below)
- 2 large egg whites
- 1 cup light corn syrup
- ¼ tsp salt
- 1 ½ cups confectioners' sugar
- 1 Tbsp vanilla extract
- ¼ tsp cream of tarter
- Preheat oven to 350 degrees and line cookie sheet with parchment paper or a Silpat.
- Cream sugar and butter together in a stand mixer with paddle attachment (or a large bowl with a hand mixer) until light and fluffy. Add eggs and vanilla and mix to combine.
- In a separate large bowl, whisk together flour, baking powder, and salt. Stir in ½ cup crushed conversation hearts.
- Slowly pour the flour mixture into the wet mixture, mixing on low all the time. Stop mixer when dough is just combined taking care not to over-mix.
- Place rounded tablespoons of dough on prepared cookie sheet about 1 ½ inches apart. Bake for about 14 minutes, until edges are just starting to turn golden. If you’re using the large conversation hearts, take baking sheets out of the oven after about 10 minutes, push the hearts in the center of each cookie, and return baking sheets to the oven.
- Let cookies rest on baking sheets for about 5 minutes before moving them to wire racks to cool completely.
- Once the cookies are cool, spread one with a thin layer of marshmallow fluff and then top with another cookie. Roll the cookie on its side in the bowl of remaining crushed conversation hearts.
- Place cookies in the fridge for about 10 minutes to let marshmallow fluff firm up.
- In the bowl of a stand mixer with whisk attachment beat together egg whites, corn syrup, and salt on high speed for 4-5 minutes until the mixture thickens quite a bit. Your mixture will have started clear, but after beating, it will turn bright white
- Mix in the confectioners' sugar, vanilla, and cream of tartar on low speed, until combined.
- Store in an airtight container in the fridge for up to ten days.
Simply Life says
oh these are too cute! I think you're definitely onto something with your business plan!
Gia Grossman says
So pretty! I love that biz idea. I never buy conversation hearts but now I want to bake something with them!
Stephanie @ Girl Versus Dough says
These are sooooo cute and creative! I'm not a huge fan of eating conversation hearts on their own but in a cookie with marshmallow filling? Yes please!
these look very fun 🙂 although i always ate the white hearts and pretty much that's it!
These are adorable and so creative! I totally love conversation hearts too and LOVE your idea for themed ones!
I love this time of year!! Happy Valentine's Day! These are beauts 🙂
These are so pretty! I love how colorful they are. The counters in our new kitchen are not great for meat mallets. I learned that with chicken the other night. Can't wait to renovate. 🙂
My conversation heart would say "SWAK" or (Sealed or Sent with a Kiss).
These cookies are very beautiful, Sues…super Post!!
These look seriously amazing! I love all the colors!
These are so cute! I love them! They remind me of spring. I made something for Valentine's Day already too! We are so on our game.
Sweet as Sugar Cookies says
Way awesome! Pinning these.
Sarah K. @ The Pajama Chef says
i agree--conversation hearts are bizarre now! last year i saw glitter ones that were pretty cool. these cookies are so pretty!!
I can totally dig these Valentine marshmallow cookies- Yes!
Thanks for sharing.
peachy @ The Peach Kitchen says
awww. this is too cute!!!
SUCH a cute post! I haven't had these hearts since junior high I think...yes it's been too long! I love how you've baked them into cookies. Kinda like funfetti...but way cooler.
TOTALLY! Why are they so hard to read now? I swear when we were little the messages were totally clear. CUTE cookie idea. Colorful and fun- perfect for valentine's day
these are just SO pretty, the entire process is pretty. what is better than gorgeous pastel colors to warm up winter.
These are so fun and colorful! xx a girl and her food
Caroline Taylor says
These are so cute! I love the idea and the colours are great.
Great web site. A lot of useful information here.
I am sending it to a few pals ans also sharing in delicious.
And certainly, thank you for your sweat!
Meghan McDonnell says
Where is the marshmallow fluff recipe? It keeps saying here but nothing is click able
@Meghan- I'm so sorry! The fluff recipe can be found in this post: https://wearenotmartha.com/2011/06/smores-pancakes/
Meghan McDonnell says
Meghan McDonnell says
Cam you freeze the left over marshmallow fluff?
@Meghan- Good question! I've never attempted it and did a bit of research and couldn't find a conclusive answer. I want to say it wouldn't freeze wonderfully as it wouldn't be as ooey-gooey after thawing, but I could be wrong. I'm definitely going to try freezing some next time I make a batch... Let me know if you try!
Marjory Pilley says
These are so much fun! And...they never get used at my house and I end up snacking on them for way to long! Love the fluff!
This is perfect for upcoming Valentine's Day, these are so cute!
Vicki T says
How much cream of tartar in the cookie recipe? It says to mix it with the flour, etc but is only listed in the Fluff ingredients list.
@Vicki- You're right- that's an error! There's no cream of tartar in the cookie recipe- I've edited the instructions. Thank you!!
I just made the cookie part and they are so fun! Like little fruity sugar cookies. Next time I'll make the fluff filling. Thanks for giving me a yummy way to put conversation hearts to use!