Preheat the oven to 350°F. Line two b sheets with parchment paper or silicone liners and set aside.
In a large bowl, beat the butter, ½ cup confectioners sugar, cocoa powder, and vanilla extract until fluffy (about 3-5 minutes).
Add the flour and salt, mixing until a dough forms.
Fold in the mini chocolate chips.
Scoop out the dough, roll into 1-inch balls, and place on a cookie sheet at least 1 inch apart. *
Bake for 10 minutes, or until bottoms are light brown. Do not overbake. Allow cookies to cool just until they can be handled, about 3-5 minutes. You want to roll them while still warm.
Add about confectioners sugar to a shallow bowl and roll each cookie in it. Place rolled cookies on a cooling rack. Once cookies are fully cooled, roll in confectioners sugar once more before storing or serving.
Notes
If your cookie dough is too sticky or difficult to handle, pop it in the fridge to chill for a little bit. This will make it easier to handle and roll into balls or roll into the sugar. If your powdered sugar becomes too clumpy while rolling your cookies you may need to empty the bowl and start with fresh powdered sugar.Store cookies in an airtight container at room temperature for up 3-5 days.