Chewy, no-bake peanut butter oatmeal cookies that come together quickly on the stovetop—no cocoa or oven needed. Customize sweetness and mix-ins, and they set in about 30–45 minutes.
Makes about 18–22 small cookies depending on scoop size. Start with less sweetener and adjust to taste before adding oats. Keep heat gentle to prevent separation or dryness. Adjust texture by adding oats if too sticky or a splash of milk if too dry. For natural peanut butter, stir very well and add extra oats if the mixture seems loose. Store airtight at room temperature for 3–4 days, refrigerate up to 1 week, or freeze up to 2 months.