There are so many things to love about this Mississippi Mud Brownie recipe, which is why it’s a guaranteed crowd pleaser! This recipe was inspired by my Mississippi Mud Cake recipe that has gone viral on facebook–it’s has nearly 30 MILLION views. Obviously you all love the chocolate/marshmallow combo as much as I do, so this brownie version is only appropriate.
How to make Mississippi Mud Brownies:
Make the brownie batter. Mix cocoa powder and oil. Add softened butter and mix until smooth. Add sugar and mix well. Add eggs, one at a time, mixing after each addition. Add vanilla. Stir in flour and salt, just until combined.
Bake. Pour batter into greased 9×13 inch pan and bake at 350 degrees F for 25-30 minutes or until a toothpick inserted into the center comes out clean.Add Marshmallows. Remove brownies from the oven and sprinkle the marshmallows evenly on top. Return to the oven for 2-3 minutes or until the marshmallows are puffed. Remove from oven and allow them to cool completely. Once brownies are cool, make the frosting.
Make the Frosting. Add melted butter, cocoa powdered, evaporated milk, vanilla, and 2 cups of powdered sugar to a mixing bowl and beat with electric beaters until smooth. Add more powdered sugar, a cup at a time, mixing well, until you reach your desired frosting consistency. I usually use about 3 ¼ cups powdered sugar. Spread frosting over the cooled brownies.
Pro Tip for Cutting Frosted Brownies: Use a plastic knife! The frosting and marshmallows will cut smoother and easier, without making a sticky mess, if you use a plastic knife to cut the brownies.
Make Ahead and Freezing Instructions:
To Make Ahead: I almost like these brownies even better the second day. Something about the way the flavors blend together and settle after several hours makes them even more irresistible. I also feel like they’re a little less “rich” on day two, and they are easier to cut. But, it may be hard to wait that long, so feel free to dig in right away. The frosting can be made up to 2 weeks in advance, stored in an airtight container in the fridge. To Freeze: The brownies can be frozen frosted or unfrosted, covered well, for up to 3 months. Allow to come to room temperature before serving.
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