01 - Preheat oven to 350°F. Line a baking sheet with parchment paper.
02 - Whisk together flour, cocoa powder, baking soda, and salt in a medium bowl.
03 - In a large bowl, beat softened butter with granulated and brown sugars until light and fluffy.
04 - Add egg and vanilla extract to the butter mixture and beat until fully combined.
05 - Gradually add the dry mixture to the wet ingredients, mixing until just combined.
06 - Fold semisweet chocolate chips into the dough evenly.
07 - Drop dough in small, irregular mounds approximately 2 inches apart onto the prepared baking sheet.
08 - Bake for 18 to 20 minutes until set and slightly crisp around edges.
09 - Allow to cool completely, then break into crumbles. Enjoy alone or as an ice cream topping.