Pre-heat the oven at 160 ° Celsius and prepare the middle rack. Line a baking tray with baking paper and set aside
Beat the butter, white sugar and brown sugar together until smooth, light and creamy in a stand mixer, or hand mixer. You can do this using a whisk by hand but it will take roughly 10 minutes of beating
Add the egg and vanilla and beat until smooth
In another bowl, sift the flour, baking soda and salt to remove lumps
Add the dry ingredients into the wet mixture, along with the thandai powder. Mix everything until just combined
Add the chocolate into the mixing bowl and fold everything together until the chocolate is just combined
Scoop the cookie dough onto the baking tray keeping a inch or so between each dough ball. I use an ice cream scoop to get perfect shaped cookies
Top the cookies with a tiny pinch of salt, and a small piece of white chocolate (optional!)
Bake the cookies until golden brown. This will take about 10-12 minutes. Rotate them half way through baking to get a really even bake on the cookies
