fudgy puffy chocolate cookies (changed the name so you don't confuse these with my traditional merin

Ingredients

• 1 cup bittersweet (divided) chocolate chips (do not exceed 61 percent cacao)
• 1 1/2 cups confectioners’ sugar, (divided)
• 1/3 cup unsweetened good quality cocoa powder (I used natural Callebaut)
• 2 teaspoons cornstarch
• 2 large egg whites, room temp
• 1/2 teaspoons vanilla extract
• 1/8 teaspoon cream of tarter
• 2 pinches kosher salt