Name: Conversation Heart Cookies with Marshmallow Fluff
Prep time: 20 min
Cook time: 12 min
Total time: 1 h 32 min
Cuisine: American
Ingredients: 2 ½ cups all-purpose flour; ½ teaspoon baking powder; ¼ teaspoon salt; 1 cup unsalted butter, softened; 1 cup granulated sugar; 1 large egg; 1 teaspoon vanilla extract; 1 cup marshmallow fluff; ½ cup unsalted butter, softened (for filling); 1 cup powdered sugar; 1 teaspoon vanilla extract (for filling); Food coloring (optional); Colored icing or edible markers for decoration

Why You’ll Love Conversation Heart Cookies with Marshmallow Fluff Recipe

These cookies combine classic sugar cookie flavors with the irresistible charm of marshmallow fluff filling, creating a delicious and festive treat. They’re easy to customize with different colors and messages, making them ideal for gifting or special celebrations. Whether you’re baking with kids or whipping up something thoughtful for a loved one, this recipe brings joy to any kitchen.

Ingredients

(Tip: You’ll find the full list of ingredients and measurements in the recipe card below.)

For the Cookies:
2 ½ cups all-purpose flour
½ teaspoon baking powder
¼ teaspoon salt
1 cup unsalted butter, softened
1 cup granulated sugar
1 large egg
1 teaspoon vanilla extract

For the Marshmallow Fluff Filling:
1 cup marshmallow fluff
½ cup unsalted butter, softened
1 cup powdered sugar
1 teaspoon vanilla extract
Food coloring (optional)

For Decoration:
Colored icing or edible markers for writing messages

Directions

Prepare the Cookie Dough: In a medium bowl, whisk together the flour, baking powder, and salt.
In a large mixing bowl, beat the butter and granulated sugar until light and fluffy. Add the egg and vanilla extract, mixing until fully incorporated.
Gradually add the dry ingredients into the wet mixture, mixing until a smooth dough forms.
Divide the dough into two portions, wrap each in plastic wrap, and chill in the refrigerator for at least 1 hour.
Preheat the oven to 350°F (175°C). Line baking sheets with parchment paper.
On a floured surface, roll out the chilled dough to about ¼-inch thickness. Use heart-shaped cookie cutters to cut out cookies.
Transfer the hearts to the prepared baking sheets and bake for 10–12 minutes, or until edges are lightly golden. Allow the cookies to cool completely on wire racks.
Make the Marshmallow Fluff Filling: In a mixing bowl, beat together the marshmallow fluff, softened butter, powdered sugar, and vanilla extract until smooth and fluffy. Add food coloring if desired.
Assemble the Cookies: Spread or pipe marshmallow filling onto the flat side of half the cookies. Top with the remaining cookies to form sandwiches.
Decorate: Write sweet messages on each cookie using colored icing or edible markers.

Servings and timing

Servings: 12 sandwich cookies
Prep Time: 20 minutes
Cooking Time: 12 minutes
Chill Time: 1 hour
Total Time: 1 hour 32 minutes
Calories: 220 kcal per sandwich cookie

Variations

Chocolate Twist: Add 2 tablespoons of cocoa powder to the cookie dough for a chocolate version.
Different Shapes: Use other festive cutters like stars or circles for different occasions.
Flavored Fillings: Add a drop of peppermint, almond, or strawberry extract to the marshmallow filling.
Sprinkle Coating: Roll the cookie edges in sprinkles after assembling for extra color and crunch.
Colored Dough: Tint the cookie dough itself with pastel food coloring before rolling it out.

Storage/Reheating

Store the assembled cookies in an airtight container at room temperature for up to 3 days, or refrigerate for up to 1 week. To keep them soft, place a slice of bread in the container. For longer storage, freeze the cookies (unassembled or assembled) for up to 2 months. Thaw at room temperature before serving. No reheating is necessary unless you prefer warm cookies—just a few seconds in the microwave will do.

FAQs

How do I keep the cookies from spreading too much during baking?

Chilling the dough for at least an hour helps prevent spreading and maintains the heart shape.

Can I use store-bought marshmallow fluff?

Yes, store-bought marshmallow fluff works perfectly for the filling.

Can I make these cookies ahead of time?

Absolutely. You can make the dough and filling in advance and store them separately until you’re ready to assemble.

What kind of food coloring works best?

Gel food coloring provides vibrant colors without affecting the texture of the filling.

Can I use royal icing for decoration?

Yes, royal icing is great for writing neat messages and dries quickly.

Are these cookies suitable for mailing as gifts?

Yes, just be sure they’re well packed in layers with wax paper in a sturdy container.

Can I use gluten-free flour?

Yes, a 1:1 gluten-free baking flour blend can be substituted with similar results.

Do I need to chill the dough?

Yes, chilling helps the dough firm up, making it easier to roll and cut clean shapes.

Can I double the recipe?

Definitely. Simply double all ingredients and work in batches for rolling and baking.

What’s the best way to apply the filling neatly?

Use a piping bag or zip-top bag with the corner snipped off for a clean, even application.

Conclusion

Conversation Heart Cookies with Marshmallow Fluff are a delightful way to share love through baking. Whether you’re creating a colorful batch for Valentine’s Day or personalizing treats for a special event, these cookies deliver charm and flavor in every bite. Their soft texture, nostalgic design, and fluffy filling make them an irresistible addition to any dessert table.

Conversation Heart Cookies with Marshmallow Fluff