On 2/4/2017 at 2:48 AM, pastrygirl said:Working the dry ingredients for 2 minutes sounds like a very long time.
Less mixing = less gluten development = weaker shortbread, not stronger. The amount of water in butter is minimal, so less or more mixing isn't going to make that much of a difference to texture, but if the OP wants strength, less mixing is the wrong direction, imo.