01 -
Set the oven to 350°F (175°C) and prepare a baking sheet using parchment paper.
02 -
In a bowl, blend together soft butter with brown and white sugar until creamy.
03 -
Incorporate eggs individually, mixing thoroughly after each, then add vanilla.
04 -
Mix flour, cocoa, baking soda, and salt in a separate bowl.
05 -
Slowly merge the dry and wet mixtures, stirring until just blended.
06 -
Mix in chocolate chips, nuts, and mini marshmallows.
07 -
Take roughly 2 tablespoons of dough, flatten to form a disc.
08 -
Position half a large marshmallow at the center.
09 -
Flatten another dough bit, lay it atop, and seal edges enclosing the marshmallow.
10 -
Continue the process for all cookies.
11 -
Set shaped cookie dough spheres on baking sheet, spacing them apart.
12 -
Cook for 10-12 minutes until rims are defined but middles are soft.
13 -
Allow cookies to chill on sheet before moving to a wire rack.