Preheat oven to 350°F and line a baking sheet with parchment paper. Set aside.
In a large bowl, beat the vanilla and egg whites with an electric mixer on high until they become foamy.
Add cream of tartar and continue beating until soft peaks form.
Gradually add in sugar and continue beating until stiff peaks form. Gently fold in chocolate chips.
Portion out in heaping tablespoons onto prepared baking sheet. Place in the oven and immediately turn oven off, leaving door closed. Let sit in closed oven for at least 5 hours and up to overnight.