Prep Time 15 minutes mins
Cook Time 25 minutes mins
Resting Time 30 minutes mins
Total Time 1 hour hr 10 minutes mins
For the most tender crumb, avoid overmixing once the flour is added and keep the dough cool; a brief 10-minute chill in the pan before baking helps prevent spreading and enhances the signature crumbly texture. Rice flour is traditional for extra snap, but cornstarch yields a similarly delicate bite if that’s what you have. If your butter is very soft or your kitchen is warm, extend the chill to 20–30 minutes. Baking at a lower temperature preserves the pale color, so pull the shortbread before it browns deeply. Store in an airtight tin for up to a week, or freeze baked cookies for up to 2 months; they crisp back up after a few minutes at room temperature.