In a large bowl, whisk melted butter, 3/4 cup granulated sugar, molasses, eggs, and vanilla until smooth.
In a separate bowl, combine flour, cocoa powder, salt, and baking soda. Fold flour mixture into liquid until dough is just combined (dough will be slightly sticky)
Wrap dough in plastic wrap and chill in refrigerator at least 2 hours or up to 6 days.
When ready to bake, preheat oven to 350F and line two large sheet pans with parchment paper.
Scoop dough into 1-inch balls and roll in remaining 1/4 cup granulated sugar then in powdered sugar until evenly coated. Place dough balls 1 inch apart on prepared sheet pans.
Bake cookies at 350F 10-12 minutes until cookies are puffy and cracked on top. Allow cookies to cool on sheet pan 10 minutes then transfer to a cooling rack to cool completely. Enjoy!