Its so delicious but easier to make than it looks.

Like the cake, its exact lore is debated, as are its components.

Thats what I went for here, keeping the process simple but the results delicious.

Closeup of a small multicolored plate with a slice of Mississippi Mud Pie with a fork next to a plate of the pie with several slices removed and a stack of empty plates

Simply Recipes / Photo by Julia Gartland / Food Styling by Kaitlin Wayne

The most hands-on layer of the bunch is the brownie (adapted from myhomemade Cosmic Brownierecipe).

Bonus: it can be made in a few short minutes in one bowl.

Cool completely, cover with plastic wrap, and store at room temperature.

Image of a white plate of Mississippi Mud Pie with a hand holding a pie server and removing a slice on a pink background

Simply Recipes / Photo by Julia Gartland / Food Styling by Kaitlin Wayne

Keep covered and chilled in the refrigerator, then top with whipped cream within a few hours of serving.

Wrap tightly and freeze in an airtight container for up to three months.

To the bowl of a food processor fitted with the blade attachment, add the Oreos and salt.

Image of a small multicolored plate with a slice of Mississippi Mud Pie with a fork next to a plate of the pie with several slices removed and a stack of empty plates

Simply Recipes / Photo by Julia Gartland / Food Styling by Kaitlin Wayne

Process until the Oreos are finely ground.

Add the melted butter and process until the crumbs are evenly moistened.

Simple Tip!

Overhead view of a hand pushing the cookie crumb crust into the bottom and sides of a springform pan for Mississippi Mud Pie recipe

Simply Recipes / Photo by Julia Gartland / Food Styling by Kaitlin Wayne

Use a rolling pin or something similar to crush the cookies into crumbs.

Scrape the crumb mixture into the springform pan.

Chill in the fridge for at least 5 minutes while you make the brownie batter.

Overhead view of a clear glass bowl of the brownie batter mixture and a spatula for Mississippi Mud Pie recipe

Simply Recipes / Photo by Julia Gartland / Food Styling by Kaitlin Wayne

Add the butter and bittersweet chocolate to a large microwave-safe bowl.

Microwave in 30-second intervals, stirring between, until completely melted, about 1 minute total.

Add the oil to the butter and chocolate mixture and whisk to combine.

Overhead view of a springform pan showing the baked brownie batter before cooling and deflating for Mississippi Mud Pie recipe

Simply Recipes / Photo by Julia Gartland / Food Styling by Kaitlin Wayne

Add the granulated sugar and light brown sugar and whisk until combined and no lumps of brown sugar remain.

Add the eggs and vanilla and vigorously whisk until the eggs are completely incorporated into the batter.

Whisk in the cocoa powder, salt, and baking soda until just combined.

Overhead view of a springform pan showing the baked brownie batter after cooling and deflating for Mississippi Mud Pie recipe

Simply Recipes / Photo by Julia Gartland / Food Styling by Kaitlin Wayne

A toothpick inserted about 1 inch from the edge will come out with very moist crumbs.

Do not overbake as this can yield a hard brownie once chilled.

The brownie will continue to cook through as it cools.

Overhead view of a springform pan with the pudding added to the baked crust and brownie batter for Mississippi Mud Pie recipe

Simply Recipes / Photo by Julia Gartland / Food Styling by Kaitlin Wayne

The brownie will deflate during cooling, leaving a bit of a lip.

To a large bowl, add the cold milk.

Sprinkle the pudding mix over the milk and whisk until thickened to a soft pudding consistency.

mississippi mud pie on a plate with a slice of pie on a plate next to it for mississippi mud pie recipe

Simply Recipes / Photo by Julia Gartland / Food Styling by Kaitlin Wayne

It should be spoonable and not runny.

Scrape the pudding over the cooled brownie layer.

Smooth the pudding over the brownie layer, staying within the crust.

Its okay if the pudding mounds a little in the center.

Press a piece of plastic wrap against the pudding.

When ready to serve, remove the outer ring of the springform pan from the base.

If desired, use an offset spatula to slide the pie onto a serving platter.

Spoon the whipped cream over the pudding layer, making decorative swoops as desired.

Lightly dust the whipped cream with cocoa powder (if using).

For the cleanest slices, wipe the knife clean between cuts.

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