📝 Instructions

1. 1 Beat butter and icing sugar until pale and fluffy
2. 2 Mix in egg yolk and vanilla
3. 3 Fold in flour and salt to form a smooth dough
4. 4 Wrap and chill 20 mins
5. 5 Preheat oven to 175C and line 2 trays
6. 6 Roll dough into 24 small balls
7. 7 Place on trays and press deep indent in each with your thumb
8. 8 Fill each indent with 1/4 tsp jam
9. 9 Bake 12-14 mins until pale golden
10. 10 Cool completely before moving