Everyone will swoon as soon as they take a bite.

Thechocolate sheet cakeis topped with a layer of mini marshmallows, sometimes nuts, and cooked chocolate icing.

When layered together, the cake resembles the muddy terrain along the Mississippi River and tastes incredibly delicious.

Overhead view of Mississippi Mud Cake in a blue baking dish with a serving utensil and one slice already removed

Simply Recipes / Photo by Andrew Bui / Food Styling by Kaitlin Wayne

This recipe is low effort and high reward.

Arent those always the best kinds of desserts?

All the magic comes from the combination of flavors and textures.

Closeup side view of a slice of Mississippi Mud Cake on a white surface and light blue background

Simply Recipes / Photo by Andrew Bui / Food Styling by Kaitlin Wayne

Lightly spray a 9x13-inch metal baking pan with nonstick cooking spray.

In a large bowl, whisk together the hot coffee and cocoa powder until smooth.

Let sitto bloom(this helps develop the chocolate flavors) and cool slightly, about 5 minutes.

Overhead view of a hand whisking hot coffee and cocoa powder together in a clear glass bowl for Mississippi Mud Cake recipe

Simply Recipes / Photo by Andrew Bui / Food Styling by Kaitlin Wayne

Add the granulated sugar and whisk to combine.

Add the flour, baking powder, baking soda, and salt and whisk until just combined.

Scrape the batter into the prepared pan.

Overhead view of a clear glass bowl with a whisk after mixing the remaining ingredients to the coffee mixture for Mississippi Mud Cake recipe

Simply Recipes / Photo by Andrew Bui / Food Styling by Kaitlin Wayne

Dont turn off the oven.

Remove the cake from the oven.

Sprinkle the mini marshmallows evenly over the cake.

Overhead view of a light blue baking dish of the batter after baking for Mississippi Mud Cake recipe

Simply Recipes / Photo by Andrew Bui / Food Styling by Kaitlin Wayne

There will be gaps between the marshmallowsthats okay.

Set the pan on a wire rack.

Immediately after topping the cake with pecans, make the icing.

Overhead view of a light blue baking dish of the batter after topping with marshmallows and pecans for Mississippi Mud Cake recipe

Simply Recipes / Photo by Andrew Bui / Food Styling by Kaitlin Wayne

Add the butter to a medium saucepan and melt over medium heat.

Add the cocoa powder, milk, vanilla, and salt to the butter and whisk until smooth.

Gradually whisk in the powdered sugar until smooth and glossy.

Overhead view of a small saucepan and whisk after melting the butter and adding cocoa powder, milk, vanilla, and salt for Mississippi Mud Cake recipe

Simply Recipes / Photo by Andrew Bui / Food Styling by Kaitlin Wayne

Remove from the heat and let cool ever so slightly, 2 to 3 minutes.

Give the icing a good stir and then pour it evenly over the cake.

Top with the remaining 1/3 cup of pecans (if using).

Overhead view of a light blue baking dish of Mississippi Mud Cake recipe after pouring the icing on top of the pecans and marshmallows

Simply Recipes / Photo by Andrew Bui / Food Styling by Kaitlin Wayne

Allow the cake to cool completely in the pan set over the wire rack before serving.

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Overhead view of three plates each containing a slice of Mississippi Mud Cake next to two glasses of milk

Simply Recipes / Photo by Andrew Bui / Food Styling by Kaitlin Wayne