Name: Swiss Chews {Flourless Chocolate Crinkle Cookies}
Prep time: 30 min
Cook time: 10 min
Total time: 40 min
Yield: 36
Ingredients: 1/2 cup brown sugar; 1/2 cup powdered sugar; 1/2 cup unsweetened cocoa powder; 1 tablespoon instant espresso powder (optional); 1 tsp kosher salt; 8 ounces semisweet chocolate chips; 1 cup finely chopped walnuts; 3 eggs (separated); 2 tsp vanilla; 1/2 - 3/4 cup powdered sugar (for rolling prepared dough in )