Chocolate chip shortbread recipe

This recipe makes some really nice crumbly shortbread.  I developed this recipe from a basic shortbread “3-2-1” recipe, so-called because it’s 3 parts flour, 2 parts butter and 1 part sugar.  I tweaked this recipe gradually to my personal preference.  I’ve since developed quite a few variants, but this recipe is the classic one that all of my colleagues and family enjoy.  I hope you do too.