Indulge in the ultimate chocolate treat that brings both nostalgia and delight to dessert lovers: rich, fudgy brownies topped with gooey marshmallows and a decadent icing. Every bite of these delightful Mississippi Mud Pie Brownies is a symphony of flavors, creating a creamy yet crispy texture that is sure to satisfy your sweet tooth. Perfect for family gatherings or cozy nights in, these brownies are designed to evoke joy and comfort.
The combination of melted chocolate and buttery goodness will have you dreaming of a slice of heaven with each forkful. Whether you’re a chocolate fanatic or just looking for a crowd-pleasing dessert, this recipe is as rewarding to make as it is to enjoy. Get ready to create a sweet masterpiece that’s sure to be the star of any dessert table!
Quick Answer
This Mississippi Mud Pie Brownies recipe yields delicious, fudgy brownies, featuring a delightful combination of chocolate, marshmallows, and creamy icing that’s sure to please anyone who enjoys sweet treats.
Why You’ll Love This Recipe
These Mississippi Mud Pie Brownies are an effortless yet impressive dessert that combines the best elements of brownies and marshmallow fluff. Here’s why you’ll love making them:
- Decadent chocolate flavor that satisfies cravings.
- Chewy, gooey marshmallows for a fun texture.
- Simple ingredients you likely have on hand.
- Easy to prepare, with minimal mess.
- A crowd-pleaser for parties or shared meals.
- Rich icing elevates the brownies to gourmet status.
What Makes This Recipe Special
This dessert beautifully balances texture and flavor through its layered construction. The dense, fudgy brownie at the base serves as the perfect foundation, while the melted marshmallows create a fluffy contrast that’s irresistibly appealing. Topped with a creamy chocolate icing, the entire experience is a delightful treat for both the eyes and the palate. The simplicity of the ingredients harmonizes beautifully, making it a cherished recipe that allows home bakers to shine.
Kitchen Tools You’ll Need
- 9×13 inch cake pan – Essential for baking the brownies evenly.
- Parchment paper – Prevents sticking and aids in easy removal.
- Cooking spray – Helps ensure nothing sticks to the pan.
- Medium saucepan – Used for melting butter and combining ingredients.
- Mixing bowls – For mixing the brownie batter and icing.
- Whisk – Helps to blend the ingredients smoothly.
- Spatula – Ideal for folding in ingredients gently.
Ingredients
unsalted butter: Adds richness and moisture to the brownies.
granulated sugar: Sweetens and helps create a moist texture.
canola oil: Keeps the brownies tender and enhances the fudgy texture.
vanilla extract: Infuses warm flavor and depth into the brownies.
eggs: Binds the ingredients together while providing structure.
all purpose flour: Provides the necessary structure for the brownies.
Dutch process cocoa powder: Contributes a deep chocolate flavor and color.
salt: Enhances the sweetness and balances the flavors.
dark or milk chocolate: Adds a rich, melty chocolate experience.
mini marshmallows: Creates a gooey topping that adds sweetness and texture.
salted butter: Used in the icing for a creamy, rich finish.
powdered sugar: Sweetens and thickens the icing.
unsweetened cocoa powder: Enriches the icing with extra chocolate flavor.
whole milk: Adds creaminess and helps achieve a silky icing texture.
vanilla extract: Complements the chocolate and enhances overall flavor.
Ready to cook? Scroll to the recipe card below for exact measurements.
How to Make Mississippi Mud Pie Brownies
Phase 1 – Prep
STEP 1. Preheat oven. Set to 350°F and line a 9×13 inch cake pan with parchment paper, lightly spraying with cooking spray.
STEP 2. Melt butter. In a saucepan over low heat, melt 1 cup unsalted butter. Stir in 2 1/2 cups granulated sugar until smooth. Cool for 5 minutes.
STEP 3. Mix in oil and vanilla. Stir in canola oil and vanilla extract until well combined.
STEP 4. Add eggs. Beat in 5 large eggs one at a time, ensuring each is well incorporated.
STEP 5. Sift dry ingredients. Sift in 1 cup all purpose flour, 3/4 cup + 1 tablespoon Dutch process cocoa powder, and 3/4 teaspoon salt, mixing until just combined.
STEP 6. Fold in chocolate. Gently fold in most of the 8 ounces of dark or milk chocolate chunks until evenly distributed.
Phase 2 – Cook
STEP 7. Pour batter. Transfer the batter to the prepared pan and spread it evenly. Sprinkle the remaining chocolate on top.
STEP 8. Bake brownies. Bake in the preheated oven for 25 minutes.
STEP 9. Add marshmallows. Remove from the oven and top with 6 cups mini marshmallows, baking for an additional 3 minutes until marshmallows are slightly toasted.
Phase 3 – Serve
STEP 10. Prepare icing. In a new bowl, melt 6 tablespoons salted butter, then mix with 2 1/2 cups powdered sugar, 2 tablespoons unsweetened cocoa powder, 1/4 cup whole milk, and 2 teaspoons vanilla extract.
STEP 11. Pour icing. Drizzle the icing over the marshmallows and let set before slicing into squares.

Why This Recipe Works
The interplay of textures is a highlight, with the dense brownie base striking a balance against the fluffy marshmallows on top. The chocolate flavor layers from both the cocoa powder and chocolate chunks ensure a rich experience. By baking the marshmallows just until they begin to toast, they create a delightful layer that contrasts beautifully with the fudgy brownies beneath. The added icing not only enhances flavor but also adds a silky-smooth finish, making every bite a heavenly journey.
Pro Tips
To make the most of your Mississippi Mud Pie Brownies, consider the following tips: use high-quality chocolate for a richer flavor, ensure not to overbake the brownies to retain their fudgy texture, and let the icing set completely before slicing for clean cuts. For variations, you can try mixing in nuts or using different flavored extracts, such as almond, for an extra twist. Always monitor the marshmallows while baking to achieve your desired level of toastiness without burning.
Common Mistakes to Avoid
Mistake: Overmixing the batter.
Why it happens: This can lead to tough brownies.
How to fix it: Mix until ingredients are just combined without dry streaks.
Mistake: Underbaking the brownies.
Why it happens: Fudgy centers may cause confusion about doneness.
How to fix it: Stick to the suggested baking time, testing for doneness with a toothpick that should come out with a few moist crumbs.
Mistake: Not allowing the icing to set.
Why it happens: Rushing to slice the brownies can lead to messy servings.
How to fix it: Be patient, allowing icing to set fully before cutting.
Variations
- Use peanut butter chips instead of chocolate for a nutty twist.
- Add chopped nuts for extra crunch.
- Substitute white chocolate for a sweeter dressing.
- Try mini chocolate chips within the batter for an extra chocolate experience.
- Top with caramel drizzle for added richness.
Nutrition Highlights
| Nutrient | Role |
|---|---|
| Protein | Helps support satiety and balanced meals. |
| Fiber | Contributes to digestive health and can assist with fullness. |
| Calcium | Supports bone health and helps in muscle function. |
Serving Ideas
These luscious brownies make a delightful addition to any gathering. Serve them warm with a scoop of vanilla ice cream for an indulgent dessert, or enjoy them as an afternoon treat with a cup of coffee. They can also be cut into smaller squares to accompany a dessert platter alongside cookies and fruit for a balanced offering.
Best Occasions for This Recipe
This recipe shines at family celebrations, backyard barbecues, and holiday gatherings. Whether you’re celebrating birthdays, potlucks, or just a cozy movie night at home, these Mississippi Mud Pie Brownies are versatile enough to fit any occasion. They are sure to impress guests and please sweet cravings in casual settings as well.
Meal Prep & Storage
Meal Prep
You can prep the brownie batter a day in advance, storing it in the refrigerator before baking. This allows you to enjoy freshly baked brownies with minimal effort.
Refrigeration
Store leftover brownies in an airtight container at room temperature for up to four days. If you prefer them chilled, you can refrigerate them for a firmer texture.
Freezing
For longer storage, freeze the brownies in a single layer, then wrap individually. They can be kept frozen for up to three months.
Reheating
To reheat, simply warm them in the microwave for a few seconds until soft again, or allow to come to room temperature before serving.

FAQs
Can I substitute different types of chocolate?
Yes, you can use dark, milk, or even white chocolate based on your preference for flavor.
What should I do if I accidentally overbake the brownies?
If they become too dry, try serving them slightly warmed with ice cream, which can help mask the dryness.
Can I use a different pan size?
Using a different pan size may change the baking time. Keep an eye on them to avoid overbaking.
How long do these brownies stay fresh?
They are best enjoyed within four days, but can be frozen for longer storage.
Save This Recipe for Later
Make sure to bookmark this recipe or pin it to your favorite board. These Mississippi Mud Pie Brownies are sure to become a go-to dessert that everyone will love!
Conclusion
Rich in flavor and comfort, these brownies offer a delightful twist on a classic dessert that is perfect for sharing. With simple ingredients and straightforward steps, anyone can create this heavenly treat. Whether for a special occasion or a sweet indulgence at home, Mississippi Mud Pie Brownies are bound to become a beloved recipe in your collection!

Mississippi Mud Pie Brownies
Ingredients
Method
- Preheat oven to 350°F and line a 9x13 inch cake pan with parchment paper, lightly spraying with cooking spray.
- In a saucepan over low heat, melt 1 cup unsalted butter. Stir in 2 1/2 cups granulated sugar until smooth. Cool for 5 minutes.
- Stir in canola oil and 2 teaspoons vanilla extract until well combined.
- Beat in 5 large eggs one at a time, ensuring each is well incorporated.
- Sift in 1 cup all purpose flour, 3/4 cup + 1 tablespoon Dutch process cocoa powder, and 3/4 teaspoon salt, mixing until just combined.
- Gently fold in most of the 8 ounces of dark or milk chocolate chunks until evenly distributed.
- Pour the batter into the prepared pan and spread it evenly. Sprinkle the remaining chocolate on top.
- Bake in the preheated oven for 25 minutes.
- Remove from the oven and top with 6 cups mini marshmallows, baking for an additional 3 minutes until marshmallows are slightly toasted.
- In a new bowl, melt 6 tablespoons salted butter, then mix with 2 1/2 cups powdered sugar, 2 tablespoons unsweetened cocoa powder, 1/4 cup whole milk, and 2 teaspoons vanilla extract.
- Drizzle the icing over the marshmallows and let set before slicing into squares.
