Not quite Shrewsbury Biscuits!

In my hometown of Pune, India there is a bakery- Kayani's which makes the most fabulous Shrewsbury biscuits. The biscuits( cookies) are the palest yellow, have a superb buttery flavour and taste. I have been trying to get as close as I can to that taste of home. Though not close in taste, these cookies are good and are closer in texture and taste to ' Sandies'. Here's my version of the Shrewsbury Biscuits-

INGREDIENTS:                            makes about 30, 2" dia             Prep time 30 mins  Cook time 15 mins

1. 100g (4 oz) unsalted butter               
2. 50g (2oz) ghee ( clarified butter)
3. 25g (1oz) milk powder
4. 130g (5oz) caster sugar or fine ground sugar
5. 2 egg yolks, separated
6. 225g (8oz) All purpose flour
7. 1/4tsp baking powder
8. 1/4 tsp baking soda
9. 1/4 tsp salt
10. 1tsp vanilla extract

METHOD:

1. Preheat the oven to 350F.
2. Beat the butter till it becomes light and fluffy.
3. Add in the sugar and the yolks till light and fluffy.( The colour of the butter mixture should lighten up)
4. Add in the vanilla extract.
5. Sieve together the salt, baking powder, baking soda and flour.
6. Slowly add into the butter mixture. Mix till it just comes together in a ball. The mixture should be a little crumbly at this stage. Pat it into a disc, wrap with cling film and place in the refrigerator for 15 minutes.
7. After 15 minutes roll the dough out till it is a little more than 1/4" thick but less than 1/2" thick. Using a cutter stamp out the dough in about 2" diameter circles and place on a cookie sheet.
8. Bake for about 7 minutes and then turn the sheet around and bake for another 7 to 8 mins or till they are done. The cookies should be golden brown in colour and should be a little soft to the touch when you get them out of the oven.
9. Cool on a rack right away, the cookies/ biscuits should firm up.