Prep Time 15 minutes mins
Cook Time 12 minutes mins
Resting Time 30 minutes mins
Total Time 57 minutes mins
For soft, chewy shortbread, avoid overmixing after adding flour to keep gluten development low, and measure flour by spooning and leveling to prevent a dry dough; if dough seems crumbly, add an extra teaspoon of milk at a time until it just holds together, and if it seems too soft, chill longer to control spread. Bake until just set without browning on top to maintain chew, and store cookies in an airtight container with a slice of bread or piece of apple for moisture, or freeze dough balls for up to 2 months and bake from frozen adding 1–2 minutes to the cook time.