Flourless Fudge Cookies

Details

Ingredients

• 3 cups confectioners' sugar
• ⅔ cup dark cocoa powder (such as Hershey's® Special Dark)
• ⅛ teaspoon salt
• 2 egg whites, or more as needed
• 1 tablespoon pure vanilla extract
• 1 ½ cups chocolate chips (60% cacao)