Step 1: Preheat and Prepare
Preheat your oven to 350°F (175°C). Line a baking sheet with parchment paper.
Step 2: Mix the Dry Ingredients
In a mixing bowl, whisk together the powdered sugar, cocoa powder, and salt until well combined.
Step 3: Add Wet Ingredients
Gradually add the egg whites and vanilla extract to the dry mixture. Stir until a thick, glossy batter forms.
Step 4: Fold in the Add-Ins
Gently fold in the dark chocolate chunks and cherries.
Step 5: Scoop and Bake
Scoop tablespoon-sized portions of the batter onto the prepared baking sheet, spacing them about 2 inches apart.
Bake for 12-15 minutes, or until the cookies are set on the edges but slightly soft in the center.
Step 6: Cool and Serve
Allow the cookies to cool on the baking sheet for 5 minutes, then transfer to a cooling rack to cool completely.