01 -
Preheat oven to 325°F/165°C. Line baking sheets with parchment paper.
02 -
Whip butter, powdered sugar and vanilla until light and fluffy using electric mixer.
03 -
Add flour, custard powder, and salt. Mix until combined. Dough will be soft.
04 -
Scoop 1 tablespoon (18g) dough balls, roll in granulated sugar. Press into pucks and make indentations.
05 -
Fill indentations with jam, being careful not to overfill.
06 -
Bake 13-14 minutes until set around edges and jam is almost bubbling. Cool completely on pan.