Use old-fashioned rolled oats for the best texture; instant oats can make the cookies too soft. Make sure your almond or peanut butter is natural and free from additives. For a sweeter cookie, drizzle extra honey or maple syrup on top before baking. Chill the flax egg if using it. Add nutmeg or ginger for a warm spice twist. To keep cookies chewy, slightly underbake and cool on the baking sheet. Store cookies in an airtight container at room temperature for up to 5 days or freeze for up to 3 months.