Preheat oven to 350F. Line muffin tin with paper or silicone cups or use a nonstick pan, and set aside. In a mixing bowl, whisk flour, cocoa, baking powder, and sugar together. Add applesauce and nondairy milk, and stir until just combined. Stir in chocolate chips and cranberries, plus extract (if using). Spoon into prepared muffin tin and bake 15-20 minutes, until the muffins are firm to the touch and a toothpick inserted in the center comes out clean.