Mississippi Mud is a pie, an ice cream, and cake…and now a type of blondie, apparently. Recipes vary, but they all seem to involve various types of chocolate, fudge, and sometimes coffee; other versions use pecans and marshmallows, which to me seen more like a Rocky Road combination than a Mississippi Mud one to me. In any case, these blondies are epic – a salty and sweet combination of a peanut butter cookie base, mini marshmallow middle, and chocolate icing.
This recipe comes from Oh Sweet Basil, which reports the calorie count on these treats at a whopping 519 per square. I totally believe it; they are out of this world. I adapted the icing to include more vanilla extract and added a bit more powdered sugar because it was pretty warm in Pittsburgh today, and I wanted a firmer icing texture.
Ingredients
For the blondie base
- 1 cup flour
- 1/2 teaspoon baking powder
- 1/4 teaspoon salt
- 4 tablespoons butter, at room temperature
- 1 cup light brown sugar
- 1/4 cup peanut butter
- 1 egg
- 2 teaspoons vanilla extract
- 1/2 cup peanut butter chips
- 2 cups mini marshmallows
For the icing
- 4 tablespoons butter, at room temperature
- 3 tablespoons cocoa powder
- 2 1/4 cups powdered sugar
- 1/4 cup plus 2 tablespoons heavy cream
- 1 teaspoon vanilla extract
Preparation
Preheat oven to 350 degrees. Line an 8 x 8 baking tin with parchment paper and lightly spray with baking spray.
In a medium bowl, combine flour, baking powder, and salt; set aside.
In a mixer, cream butter and brown sugar until fluffy, about 2 minutes. Add peanut butter and beat for 1 minute, then add egg and vanilla extract and beat until smooth, scraping down your bowl. Add flour mixture and beat to combine, then stir in peanut butter chips. Press into the baking tin and bake for 25-28 minutes; top with mini marshmallows, then bake another 2-3 minutes.
Remove from oven and allow to cool for about 10 minutes before icing; to make the icing, beat butter and cocoa powder on low, then medium speed, to combine. Add powdered sugar, heavy cream, and vanilla and beat until you have a smooth consistency. Spread over marshmallows; allow to set before serving. Cut into 16 squares and store in an airtight container at room temperature.
You cannot imagine how many bags of chocolate chips I have in my house at any given moment. Milk chocolate, semisweet, dark chocolate…not to mention cinnamon chips, espresso chips, caramel bits, toffee pieces…the list goes on. There’s a basket in the pantry area of my basement filled with them, bags upon bags of delicious little nuggets just waiting to enhance a recipe.