Are you ready for a dessert that combines two of the most indulgent treats—gooey marshmallows and rich chocolate—into one unforgettable experience? Look no further than these Ooey Gooey Marshmallow and Chocolate Topped Cookie Bars.

These bars are packed with all the flavors and textures you crave: a buttery cookie base, chewy marshmallows, and a layer of melted chocolate that’s absolutely irresistible.

Perfect for any occasion, they’ll satisfy your sweet tooth and leave you craving just one more bite. Whether you’re serving them at a party, baking for your family, or just treating yourself, these cookie bars are a guaranteed hit.

Why You’ll Love These Cookie Bars

These Ooey Gooey Marshmallow and Chocolate Topped Cookie Bars are more than just a dessert—they’re an experience. Here’s why they should be on your baking list:

Decadent Flavors: The sweet, buttery cookie base serves as the perfect foundation for gooey, melted marshmallows and silky chocolate. Every bite delivers a perfect balance of sweetness and texture.
Simple Ingredients: With only a few basic ingredients, these cookie bars come together easily. You likely have most of them in your pantry already, making this recipe super accessible and easy to whip up.
Quick and Easy: Unlike traditional layered desserts that take time and patience, these cookie bars are fast to make. With minimal prep and bake time, you’ll be enjoying them in under an hour.
Perfect for Any Occasion: Whether you’re hosting a casual get-together, sending a sweet gift to a friend, or simply craving a homemade treat, these bars are versatile and can be enjoyed anytime.
Kid-Friendly: These bars are a fun and playful dessert that kids (and adults!) will love. They’re easy to make together and even easier to devour!

Ingredients

These Ooey Gooey Marshmallow and Chocolate Topped Cookie Bars are made with simple, pantry-staple ingredients. Here’s everything you’ll need:

Butter: The base of any good cookie bar! It adds richness and helps achieve that melt-in-your-mouth texture.
Brown Sugar: Adds sweetness and moisture, giving the bars a chewy texture and a hint of caramel flavor.
Granulated Sugar: For a little extra sweetness and to help the cookie base crisp up just right.
Eggs: Help bind the ingredients together and provide structure to the bars.
Vanilla Extract: For an extra layer of flavor that enhances the sweetness of the bars.
Flour: The main dry ingredient that holds everything together.
Baking Powder: For a slight rise and a tender, cake-like texture in the bars.
Mini Marshmallows: The gooey, melty centerpiece of this dessert! These marshmallows transform into a sweet, sticky topping that’s irresistible.
Chocolate Chips: Use semi-sweet or milk chocolate chips to add a rich chocolate flavor that melts into a luscious topping.
Salt: Just a pinch to balance the sweetness and elevate all the flavors.

(Note: You’ll find the full ingredients list with measurements in the recipe card below.)

Instructions

Making these Ooey Gooey Marshmallow and Chocolate Topped Cookie Bars is easy and fun! Here’s how to do it:

Preheat the Oven: Begin by preheating your oven to 350°F (175°C). Line a 9×9-inch baking pan with parchment paper or lightly grease it with butter.
Make the Cookie Dough: In a large mixing bowl, cream together the butter, brown sugar, and granulated sugar until smooth and fluffy. Beat in the eggs, one at a time, followed by the vanilla extract.
Mix Dry Ingredients: In a separate bowl, whisk together the flour, baking powder, and salt. Gradually add the dry ingredients to the wet mixture, stirring until just combined. The dough will be thick and slightly sticky.
Press the Dough Into the Pan: Spread the cookie dough evenly into the prepared baking pan, pressing it down into an even layer. Don’t worry if it’s not perfectly smooth—this part doesn’t need to be exact!
Bake the Cookie Base: Place the pan in the oven and bake the cookie base for 15-20 minutes, or until the edges are golden and a toothpick inserted into the center comes out clean (with just a few crumbs).
Add Marshmallows: Once the cookie base is baked, remove it from the oven and immediately sprinkle the mini marshmallows evenly on top. Return the pan to the oven and bake for an additional 5-7 minutes, or until the marshmallows are puffy and golden brown.
Add Chocolate: Remove the pan from the oven again and sprinkle the chocolate chips on top of the warm marshmallows. Let them sit for 5 minutes to soften, then use a spatula to spread the melted chocolate into an even layer over the marshmallows.
Cool and Slice: Allow the bars to cool in the pan for at least 30 minutes, or until they’re cool enough to handle. For easier slicing, chill the bars in the fridge for 10-15 minutes to set the chocolate. Once cooled, cut them into squares or bars.
Serve and Enjoy: Serve these bars with a cold glass of milk or enjoy them on their own. Be prepared for some ooey gooey messes when you bite into the marshmallow and chocolate layers!

How to Serve These Cookie Bars

These Ooey Gooey Marshmallow and Chocolate Topped Cookie Bars are perfect all on their own, but here are a few fun ways to serve them:

With Ice Cream: Warm a bar slightly in the microwave and top it with a scoop of vanilla ice cream for an indulgent dessert.

As Party Favors: Cut them into small squares and wrap them up individually for a fun, sweet gift at parties or celebrations.

On a Dessert Platter: These bars make a beautiful addition to a dessert platter alongside cookies, brownies, and other sweet treats.

With a Warm Drink: Enjoy these bars with a cup of hot cocoa, coffee, or even a cold glass of milk for the ultimate treat experience.

Additional Tips

To ensure your Ooey Gooey Marshmallow and Chocolate Topped Cookie Bars turn out perfectly, check out these tips:

Store Them Properly: These cookie bars are best stored in an airtight container at room temperature for up to 4 days. If you need to store them longer, refrigerate them for up to a week.

Use High-Quality Chocolate: Since chocolate is one of the main ingredients, choose high-quality chocolate chips or chunks for the best flavor and texture.

Mix It Up: Feel free to add in extra goodies like chopped nuts, crushed graham crackers, or even swirls of peanut butter for a fun twist on the classic recipe.

Don’t Overbake the Cookie Base: Keep an eye on the cookie base while it bakes. You want it golden brown but not overdone, as it will continue to cook when the marshmallows and chocolate are added.

Make It Ahead of Time: These bars can be made a day or two ahead of time and stored in an airtight container, making them a great make-ahead treat for gatherings.

FAQ Section

Q1: Can I use a different type of chocolate?
A1: Absolutely! You can use milk chocolate, dark chocolate, or even white chocolate if you prefer. Just make sure to adjust the sweetness to your taste.

Q2: Can I make this recipe gluten-free?
A2: Yes, you can! Use a gluten-free all-purpose flour blend in place of regular flour for a gluten-free version of these bars.

Q3: Can I add other mix-ins to the cookie base?
A3: Yes! Feel free to add mix-ins like chopped nuts, candy chunks, or even some cookie butter for an extra twist of flavor.

Q4: How can I store leftovers?
A4: Store the bars in an airtight container at room temperature for up to 4 days, or refrigerate for up to a week. They can also be frozen for up to 3 months.

Q5: Can I make these bars dairy-free?
A5: Yes! You can substitute the butter with dairy-free margarine or coconut oil and use dairy-free chocolate chips to make these bars dairy-free.

6. Can I use marshmallow fluff instead of mini marshmallows?
While fluff works, mini marshmallows provide a better gooey texture and toast beautifully.

7. What if I don’t have a broiler?
No worries! Bake at 375°F (190°C) for a few minutes to toast the marshmallows.

8. Can I add other toppings?
Of course! Crushed pretzels, caramel sauce, or even a sprinkle of sea salt can elevate the flavor.

9. Can I use a different base, like brownies?
Yes! Brownies as the base create a rich twist to this recipe.

10. How do I prevent sticky marshmallows from messing up the knife when cutting?
Spray your knife with a bit of cooking spray or run it under hot water before slicing.

Conclusion

These Ooey Gooey Marshmallow and Chocolate Topped Cookie Bars are everything you’ve ever wanted in a dessert: sweet, chewy, and just the right amount of gooey. The combination of soft, buttery cookie base, gooey marshmallows, and melted chocolate is truly irresistible.

Whether you’re making them for a party, a family treat, or simply to satisfy your sweet tooth, these bars will hit the spot every time. So get your ingredients, preheat your oven, and get ready to enjoy these indulgent, melt-in-your-mouth cookie bars. Happy baking!