Use melting wafers or almond bark for the easiest dipping and smoothest finish; if using chocolate chips, melt gently and avoid any water contact to prevent seizing. Swap peanut butter for almond or sunflower seed butter if needed. Store cookies in an airtight container in a cool spot for up to 1 week, or refrigerate for slightly longer. Freeze in a single layer, then transfer to a container with parchment between layers for up to 2 months.