Preheat oven to 350.
Whip egg whites to soft peaks.
Slowly add sugar, whipping until stiff peaks are formed.
Fold in vinegar, cocoa, and chocolate chips. Be careful not to over mix.
Pour pavlova onto cookie sheet lined with parchment paper.
Put pavlova in the oven, immediately turn the oven down to 275.
Bake for 1 hour.
Turn the oven off and leave the pavlova in the oven until completely cool. Taking the pavlova out too soon will cause it to sink (it still tastes great though!)
Serve soon after, or wrap tightly to keep the air out.