Prep Time 20 minutes mins
Cook Time 12 minutes mins
Resting Time 30 minutes mins
Total Time 1 hour hr 2 minutes mins
For the cleanest edges, keep the dough slightly chilled as you work and re-chill scraps before re-rolling to prevent spreading. If your kitchen is warm, assemble sandwiches in small batches so the jam doesn’t run. Seedless jam gives a smoother finish, but if using seeded jam, press it through a sieve for a neat look. Avoid overbaking; these should remain pale for a tender shortbread texture. Store assembled cookies in an airtight container at room temperature for up to 3 days or freeze the unfilled cookies for up to 2 months and sandwich with jam just before serving.