Notes: Ensure the butter is melted but not hot. Do not overmix the egg to avoid stiff cookies. The dough should be easy to handle, not too wet or too dry.
Notes: Do not overbake the cookies. They should be pale and puffy when removed from the oven. Let them cool on the pan to allow them to set.
Notes: Store cookies in an airtight container for long-lasting softness, or freeze them for later.