Definition of sand tart in US English:

sand tart

noun

US
  • A light, crumbly cookie, typically made with chopped pecans.

    ‘my grandmother and my mom made sand tarts every Christmas’
    Also called sandy (noun)
    • ‘What makes sand tarts taste so pleasant is their crumbly, silky texture and toasty flavor from browned butter and ground roasted almonds.’
    • ‘Served plain, sand tarts are like cookies; invert them on the plate so the impression of the mold shows.’