In a stand mixer with whisk attachment add egg whites, salt, sugar and Jell-O.  Mix on slow for about 30 seconds to help dissolve sugar.

Once the sugar is mostly dissolved, turn the mixer onto medium high and whisk until the egg whites form stiff peaks.

Add vinegar, and mix for 10 seconds on low, add chocolate chips and mix one more time for about 20 seconds.

Line your baking sheets with parchment paper.  Spoon or pipe the batter onto the cookie sheet, and sprinkle with sprinkles.

Bake at 350 for 9 minutes, rotate the cookie sheet and bake for an additional 9 minutes.