做法：
1．牛油于室温放至软化，放进不锈钢盆内，用木匙压至油状，加入砂糖，用打蛋器打至奶白色，加入打散的蛋黄搅匀。
2．多次筛入面粉搅匀。
3．将面粉团用保鲜膜包好放入冰箱冷藏1小时。
4．取出面粉团，压至圆形，放到铺好烤盘纸的烤盘上，擀开成3毫米厚度的片状。印出自己喜欢的饼干形状。
5．隔热水把果酱烧溶。
6．用汤匙把果酱放入面粉团中间的涡形中，放入已预热170 °C的烤箱内烤约15 ~ 20分钟，从烤箱取出后放凉至硬。
Procedures:
1. Soften butter under room temperature. Stir butter to cream shape in a mixing bowl. Add sugar, whisk until mixture changes to lighter colour. Stir in beaten egg yolk. Mix well.
2. Fold in sifted flour in several times. Stir to form dough.
3. Wrap dough in plastic wrap and keep in fridge for 1 hour.
4. Line base of baking tin with non-stick baking paper. Take out dough. Shape suitable amount to rounds. Place on baking tin. Make a hollow in the centre with finger.
5. Melt jam to liquid over hot water.
6. Spoon jam to the hollow of cookies. Put into preheated 170 °C oven and bake for 15 ~ 20 minutes. Take out and cool until harden.
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