Type of Peanut Butter:Use a regular processed creamy peanut butter, such as Jif or Skippy. Natural-style peanut butter (the kind that separates) will not set properly in this recipe.
Oats:Old-fashioned oats give these cookies a chewier texture, while quick oats create a softer, more uniform cookie.
Setting Tip:Bring the mixture to the correct temperature (220–225°F / 104–107°C) to ensure that the cookies set properly and do not remain sticky.
Storage:Store cookies in an airtight container at room temperature for up to 7 days.
Freezing:Freeze on a baking sheet until solid, then transfer to a freezer-safe container. Freeze for up to 3 months.
Gluten-Free:To make these gluten-free, use certified gluten-free oats.