These brownies are rich, fudgy, and topped with gooey marshmallows and a luscious chocolate frosting.
Preheat your oven to 350°F (175°C) and grease a 9x9-inch baking pan.
Greasing the pan ensures the brownies won't stick, making them easier to remove.
In a mixing bowl, whisk together the melted butter and sugar until smooth.
Mixing until smooth helps achieve a uniform texture in the brownies.
Add the eggs one at a time, beating well after each addition.
Adding eggs one at a time ensures they are well incorporated, creating a smooth batter.
Stir in the cocoa powder, flour, salt, and vanilla extract until just combined.
Avoid overmixing to keep the brownies tender.
Pour the batter into the prepared pan and spread it evenly.
Spreading the batter evenly ensures uniform baking.
Bake in the preheated oven for 20-25 minutes, or until a toothpick inserted in the center comes out with a few moist crumbs.
Check the brownies a few minutes before the timer ends to avoid overbaking.
Remove the brownies from the oven and immediately sprinkle the miniature marshmallows evenly over the top.
Adding marshmallows while the brownies are hot helps them melt slightly and adhere.
Return the pan to the oven for 3-5 minutes, just until the marshmallows are slightly melted.
Keep an eye on the marshmallows to prevent overbrowning.
In a separate bowl, beat together the powdered sugar, softened butter, cocoa powder, and milk until smooth.
Ensure the butter is softened for a smooth frosting texture.
Once the brownies have cooled, spread the frosting evenly over the marshmallow layer.
Wait until the brownies are completely cool to prevent the frosting from melting.
Cut into squares and serve. Enjoy your decadent fudgy marshmallow brownies!
Use a sharp knife for clean cuts, and wipe it between cuts for neat squares.