A perfect butter cookie has a fine sandy texture and pure flavour of butter, flour & sugar. A plain butter cookies is a Star in its own.
A good butter cookie is an excellent base for a great variety of yummy cookies, by adding nuts, seeds, dried fruits, Flavours & spices and chocolate.
How to achieve good butter cookies? For tender flavourful cookies, measure flour carefully. Mix butter & sugar only till smooth & creamy but not fluffy though. Beating butter & sugar till fluffy produces butter cookies with a dry, coarse airy texture and diminished Flavour.
Resting & chilling cookie dough improves flavour & texture as it allows the flour to absorb moisture & butter to infuse with any added Flavours. Adding egg yolk(s) gives more enriched flavour resulting a more tender texture.