Storage: Keep in an airtight container at room temperature for up to 2 days or refrigerate up to 5 days. Freeze up to 2 months; thaw at room temperature. Substitutions: Use almond butter instead of peanut butter, or swap mini chips for chopped nuts or dried fruit. For sweeter cookies, add 0.25 cup more maple syrup and 1 tbsp more protein powder to balance moisture.