Preheat oven to 350 degrees.
Spray baking sheets with cooking spray.
Melt 1 cup of chocolate chips in a glass bowl in the microwave, stirring twice, for about 2 minutes. Cool slightly.
Using a mixer, beat the egg whites in a large bowl until soft peaks form.
Gradually beat in 1 cup Swerve. Continue beating until the mixture resembles a soft marshmallow cream.
In a separate small bowl, whisk one cup of Swerve, cocoa, cornstarch, and salt.
Beat the dry ingredients into the meringue mixture at a low speed.
Add the lukewarm melted chocolate and 1/2 cup chocolate chips into the dough. The dough will be very stiff.
Roll teaspoons full of dough into balls.
Place some Swerve in a small bowl, and roll the dough balls into the Swerve.
Place the dough balls on a baking sheet 2" apart.
Bake for 10 minutes.
Cool on the baking sheet for 10 minutes before transferring to a wire rack to cool completely.