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Mississippi Mud Brownies

Rating: 3.4 7 Comments

By adding a layer of marshmallow cream to these Duncan Hines Chocolate Decadence Brownies, you create a layer of heaven. Swirl in milk chocolate frosting and you deserve a halo for these Mississippi Mud Brownies!


  1. Preheat oven to 350 °F. Grease bottom of 13x9-inch pan.
  2. Combine brownie mix, eggs, water and oil in large bowl. Stir with spoon until well blended, about 50 strokes. Spread in pan. Bake at 350 °F for 27 to 30 minutes or until set.
  3. Spread marshmallow cream gently over hot brownies. Place frosting in microwave-safe bowl. Microwave on high power for 15 to 30 seconds. Stir until smooth. Pour frosting over marshmallow cream. Swirl with knife to marbleize. Cool completely. Cut into bars.


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zachsmum on Aug 5, 2016 8:22 p.m.

Brownies and marshmallows , heaven .

wall2wallalpaca on Aug 2, 2016 12:26 p.m.

Would the recipe be better with the brownies cut and placed on a plate for serving then add a dollup of the marshmallow cream and then dot with frosting... :) :) You can then adjust the size of the topping for the person you are serving... little ones having less and more manageable. I find often people do not enjoy the product if the presentation is too messy... although the picture looks scrumptious... it may be too much for many people.

lil_paw_222 on Jun 9, 2012 11:02 p.m.

The way that my mom made these was mix up the mix and pour it in the pan make lines in the uncooked batter with the marshmellow cream then run a knife opposite way that you made the lines originally. makes a neat marble effect for the most part, By adding the marshmellow cream before baking it, it takes some of the extra sticky and runnyness out :)

lil_paw_222 on Jun 9, 2012 10:58 p.m.

just the recipe i was looking for..... you must have known :P so tasty!

samiam on Oct 10, 2010 8:23 p.m.

This looks good,but I think I would use mini marshmallows not so sweet and then put in oven to melt when cool add icing.

SusanFerreira on Sep 17, 2010 2:04 p.m.

Tried this receipt with my 10 year old son, he loves brownies but this recipe was a different matter. The marshmallow topping was too runny and way too sweet. When you cut a piece, all of the topping ran off the top of the brownie. Too messy. There are better recipes.

sally1 on Mar 18, 2010 1:45 p.m.

this looks very good am going to try making it