01 -
In a heatproof bowl, pour hot heavy cream over chopped dark chocolate and let sit for 1 minute. Add a pinch of salt, then whisk until smooth. Chill in the refrigerator for 20–30 minutes until thickened but scoopable.
02 -
In a bowl, whisk together flour, cocoa powder, baking soda, and salt.
03 -
In a large mixing bowl, cream the butter, brown sugar, and granulated sugar until light and fluffy. Beat in eggs one at a time, then add vanilla.
04 -
Gradually mix in the dry ingredients until just combined; do not overmix.
05 -
Preheat oven to 350°F (175°C). Line two baking sheets with parchment paper.
06 -
Scoop 2 tablespoons of dough and flatten it slightly in your hand. Place 1 heaping teaspoon of chilled ganache and 4–5 mini marshmallows in the center. Top with another tablespoon of dough, sealing edges and forming a thick, tall cookie ball. Repeat with remaining dough and filling.
07 -
Place cookies 2 inches apart on the baking sheets. Gently press a few extra marshmallows and chocolate chips on top for decoration. Bake for 11–13 minutes, until cookies are set at the edges but still soft in the center. Crack the tops slightly with a spoon if desired for a rustic look.
08 -
Cool on the pan for 10 minutes before transferring to a wire rack. Serve warm for maximum gooeyness.