Mississippi Brownies
🍫 Marshmallow Brownies with Fudgy Cocoa Frosting — The Dessert That Disappears First

If you’re looking for a dessert that makes people’s eyes light up, forks fly in, and plates come back clean, this is it. These brownies are rich, chocolatey, topped with gooey marshmallows, and finished with a silky cocoa frosting that will have everyone asking for the recipe. They’re the perfect mix of chewy, fluffy, and fudgy — basically, dessert perfection in a 9×13 pan.
There’s something magical about the combination of chocolate and marshmallow. It’s nostalgic, it’s indulgent, and it’s impossible to resist. These brownies take that magic and turn it into a dessert that’s as fun to make as it is to eat.
We start with a rich cocoa brownie base, bake it until just set, then crown it with a layer of mini marshmallows that puff up into sweet clouds. And just when you think it can’t get any better, we pour over a warm, fudgy cocoa frosting that seeps into the marshmallows and sets into a glossy, irresistible topping.
Whether you’re making them for a bake sale, a family gathering, or just because you deserve something amazing, these brownies deliver every single time.
This brownie recipe is the best! Then you top it with a layer of marshmallows and you will think you died and went to heaven! It’s a really simple recipe but the flavor is out of this world!

Mississippi Brownies
Ingredients
For the brownies:
- 1/3 cup unsweetened cocoa powder
- 1 cup butter, softened
- 2 cups of sugar
- 4 eggs
- 2 teaspoons vanilla
- 1 1/2 cups flour
- 1 teaspoon salt
- 3 cups mini marshmallows
For the frosting:
- 1/2 cup melted butter
- 1/3 cup unsweetened cocoa powder
- 1/3 cup milk
- 2 teaspoon vanilla
- 3 – 3 1/2 cups powdered sugar
Directions
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Preheat & Prep
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Preheat oven to 350°F. Grease a 9×13-inch pan with non-stick cooking spray.
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Make the Brownie Batter
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In a large mixing bowl, add softened butter and cocoa powder. Mix until smooth.
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Add sugar and mix for 1 minute.
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Add eggs and mix until combined.
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Add vanilla and mix again.
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Add flour and salt; stir until just combined.
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Bake the Brownies
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Pour batter into prepared pan.
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Bake for 25–30 minutes, or until a toothpick inserted into the center comes out clean.
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Add the Marshmallows
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Remove brownies from the oven and sprinkle marshmallows evenly over the top.
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Return to the oven for 2–3 minutes, or until marshmallows are puffed.
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Remove from oven and let cool completely.
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Make the Frosting
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In a medium bowl, whisk together melted butter, cocoa powder, milk, and vanilla until smooth.
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Gradually add powdered sugar, whisking until thick but pourable.
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Frost & Finish
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Pour frosting over cooled marshmallow layer, spreading gently to cover.
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Let set before cutting into squares.
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🔢 Calorie Count & Nutritional Facts (Per Brownie — approx. 1/24 of recipe)
| Nutrient | Amount |
|---|---|
| Calories | ~230 kcal |
| Protein | 2g |
| Carbs | 34g |
| Fat | 10g |
| Fiber | 1g |
| Sugar | 25g |
| Sodium | ~120mg |
💡 Note: These are approximate values and will vary depending on your exact ingredients.

🍳 Cooking Tips — From My Kitchen to Yours
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Don’t Overbake: Pull the brownies out as soon as a toothpick comes out clean — overbaking will make them dry.
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Cool Before Frosting: If the brownies are too warm, the frosting will melt into the marshmallows instead of sitting on top.
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Frosting Thickness: If your frosting is too thick, add a splash more milk. Too thin? Add a bit more powdered sugar.
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Cutting Clean Squares: Use a sharp knife dipped in hot water and wiped clean between cuts.
🎨 Recipe Variations — Because You’re the Boss of Your Kitchen
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Nutty Twist: Add 1 cup chopped pecans or walnuts to the brownie batter.
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Peanut Butter Swirl: Drizzle warmed peanut butter over the marshmallows before adding frosting.
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Mint Chocolate: Add 1/2 teaspoon peppermint extract to the frosting for a holiday vibe.
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S’mores Style: Sprinkle crushed graham crackers over the marshmallows before frosting.
👩👧 Kid Tips — Little Hands, Big Fun
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Marshmallow Sprinklers: Let kids be in charge of adding the marshmallows — they’ll love it.
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Mixing Magic: Give them a whisk and let them help with the frosting (bonus: they get to lick the spoon).
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Decorating Crew: Add colorful sprinkles on top of the frosting for a party-ready look.
🛒 Grocery Hacks — Save Time, Save Money
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Buy Butter in Bulk: It freezes well and is cheaper in larger packs.
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Store Brand Cocoa: Often just as good as name brands for baking.
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Mini Marshmallow Stash: Keep a bag in the pantry — they last for months and are great for quick desserts.
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Powdered Sugar Tip: If yours is clumpy, run it through a sifter before making frosting for a smoother finish.
📣 Reader’s Challenge: #MarshmallowBrownieMagic
Alright, Lou Lou Girls family — it’s your turn!
Here’s how to join the #MarshmallowBrownieMagic:
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Make these Marshmallow Brownies with Fudgy Cocoa Frosting.
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Put your own spin on them — add mix-ins, change the frosting flavor, or go wild with toppings.
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Snap a photo of your creation.
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Post it on Instagram or Facebook with the hashtag #MarshmallowBrownieMagic and tag me.
💡 Extra Fun: Share who you made them for and what the occasion was. I’ll feature my favorite entries in an upcoming blog post!

💌 Why a Brownie Bar?
Brownies are already a crowd-pleaser, but when you turn them into a build-your-own dessert station, you take them from “yum” to “OH MY GOSH THIS IS AMAZING.” It’s interactive, it’s customizable, and it works for literally any occasion — birthdays, baby showers, game nights, or just a Tuesday when you need a little joy.
🗒 Step 1: The Brownie Base
Your Marshmallow Brownies with Fudgy Cocoa Frosting are the perfect starting point — rich, chewy, and already topped with gooey goodness.
Pro Tip:
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Cut them into small squares (2×2 inches) so guests can try multiple combos without getting too full too fast.
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Bake them the day before and store in an airtight container so you can focus on party setup the day of.
🍨 Step 2: Topping Ideas
Here’s where the fun begins. Think variety — different textures, flavors, and colors.
Sweet & Gooey:
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Caramel sauce
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Hot fudge
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Marshmallow fluff
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Sweetened condensed milk drizzle
Crunchy:
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Crushed Oreos
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Pretzel pieces
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Chopped nuts (pecans, walnuts, almonds)
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Toffee bits
Fruity & Fresh:
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Sliced strawberries
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Raspberries
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Blueberries
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Banana slices
Fun & Colorful:
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Sprinkles
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Mini M&Ms
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Shredded coconut
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Crushed candy bars
🍦 Step 3: Ice Cream Pairings
A brownie bar without ice cream? Not on my watch.
Classic Choices:
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Vanilla bean
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Chocolate fudge
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Strawberry
Fun Flavors:
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Salted caramel
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Cookies & cream
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Mint chocolate chip
Serving Tip: Pre-scoop ice cream into cupcake liners and freeze. When it’s party time, just pop them out — no messy scooping mid-party.
☕ Step 4: Drinks to Match
Pair your brownie creations with drinks that complement the richness.
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Hot: Coffee, hot cocoa, chai latte
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Cold: Milk (whole, almond, oat), iced coffee, cold brew
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Special Touch: A “milk flight” with different flavors (vanilla, chocolate, strawberry)
🎉 Step 5: Presentation
Make your brownie bar look as good as it tastes.
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Use tiered trays for toppings.
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Label each topping with cute chalkboard signs.
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Add a centerpiece — maybe a big jar of colorful straws or a vase of fresh flowers.
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Keep napkins, plates, and spoons right at the start of the line so guests are ready to build.
Why These Brownies Are Always a Hit
These brownies are the perfect mix of textures and flavors — rich chocolate, fluffy marshmallow, and silky frosting. They’re indulgent without being fussy, and they have that “just one more bite” quality that makes them disappear fast.
They’re also a great make-ahead dessert. You can bake them the night before, frost them in the morning, and they’ll be ready to wow by the time guests arrive.
🏆 The Dessert That Brings People Together
Here’s the thing about Marshmallow Brownies with Fudgy Cocoa Frosting — they’re not just dessert. They’re a centerpiece. They’re the plate everyone gravitates toward at a party. They’re the treat that makes people linger in the kitchen, chatting and sneaking seconds.
They’re perfect for:
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Potlucks
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Birthday parties
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Bake sales
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Random Tuesday nights when you need a little joy
So go ahead — make them, share them, and watch them disappear faster than you can say “save me a piece.”
Your Closest CHEERLEADERS!
We are your big sisters , cheerleaders , and confidence boosters in building a happy home. We are the Lou Lou Girls!



Looks taste-tempting delicious! Gotta try really soon! 😉
you will love them!
Oh my goodness, I want one of these fantastic brownies right now! Hope you are having a great week and staying warm. Thanks so much for sharing with us at Full Plate Thursday and come back soon!
Miz Helen