Hot Cocoa Oreo Brownies

Brownies filled with Oreos, hot cocoa, and a marshmallow-topped chocolate shell

If you love the ritual of a hot cocoa break on a cold day, these Hot Cocoa Oreo Brownies turn that moment into a full dessert. They start with a fudgy brownie base, get a boost of real hot cocoa powder, and hide a layer of whole Oreos in the center. A smooth blanket of melted Ghirardelli chocolate goes on top, followed by marshmallow bits that feel straight out of a cocoa mug. They’re the kind of treat you’ll want to bake when the weather turns chilly and everyone wants something warm, chocolatey, and fun.

Why You’ll Love This Recipe

• Fudgy brownies with hot cocoa flavor
• Hidden layer of whole Oreos for crunch
• Silky Ghirardelli chocolate topping
• Marshmallow bits for a true hot cocoa vibe
• Easy, semi-homemade dessert with big payoff
• Perfect for winter baking and snow day treats

Ingredient Notes

• Brownie mix: Use an 18–19 oz box so the batter is thick enough to hold the Oreos.
• Hot cocoa powder: Any classic hot cocoa mix works; it boosts the chocolate flavor without making the batter dry.
• Oreos: Keep them whole so you get defined cookie layers in each slice.
• Ghirardelli Milk Melting Wafers: Melt smoothly and set with a soft bite—perfect for topping.
• Marshmallow bits: The dehydrated kind holds up better than mini marshmallows and gives that hot cocoa look.

Before You Bake

Do I need to adjust the liquid in the brownie mix when adding hot cocoa powder?
No. The hot cocoa powder blends smoothly into the prepared batter without changing the texture, so follow the box instructions exactly.

Can I use a larger pan?
An 8×8 or 9×9 pan works best. A larger pan will make the brownies thin and won’t give you that fudgy center or clear Oreo layer.

Should I use regular mini marshmallows instead of marshmallow bits?
Use marshmallow bits. Regular mini marshmallows melt and slide off, while the dehydrated bits stay in place and hold their shape.

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FAQ

Can I use Double Stuf Oreos?
You can, but the thicker filling makes the brownies slightly taller and softer in the center. Regular Oreos give the neatest slices.

How do I know when the brownies are done?
The edges should look set, and the center should still be slightly fudgy. A toothpick will come out with moist crumbs, not raw batter.

Can I add chocolate chips to the batter?
Yes. A handful of chocolate chips makes the brownies extra rich, especially if you want a more intense hot cocoa flavor.

How should I store these brownies?
Keep them covered at room temperature for 2–3 days or refrigerate up to 5 days. The chocolate topping stays firm and slices cleanly after chilling.

Can these be frozen?
Yes. Freeze sliced brownies in an airtight container for up to 2 months. Thaw in the fridge or on the counter before serving.

Sprinkle of Fun

Make these on a snow day when everyone’s bundled up and craving something warm and chocolatey. While the brownies cool, mix up mugs of hot cocoa with extra marshmallow bits, then slice the brownies and enjoy them together while watching the snowfall.