Total ingrediens for dough:

1 cup + 2 Tbsp milk 

2 eggs

3 1/2 cups bread flour 

1 Tbsp yeast 

1/4 cup sugar

2 Tbsp dry milk

1/4 tsp salt

Step 1) make 汤种

1/2 + 2 Tbsp milk (from above totals)

3 Tbsp flour (from above totals)

Double boiler 

Step 2): make dough 

Mix the total ingredients fo dough, including 汤种。Knead 2 minutes 

+ 3 1/3 Tbsp butter , knead 10 minutes 

Raising 10 minutes

Knead 10 minutes 

Raising 90 minutes 

Step 3): 奶黄馅

Egg yolks 4，

Sugar 2/3 cup，

Milk 1/2 cup，

All purpose flour 1/4 cup，

Dry milk 2 Tbsp ，

Butter 3 Tbsp 

Double boiler 

Step 4): make bread

Raising 50 minutes

355Ｆ，16 minutes (with trays of hot water in oven)