In a bowl add all purpose flour, custard powder, salt, baking powder and cardamom powder.
Mix well till combined.
In the bowl of the stand mixer or a large bowl add sugar and unsalted butter.
Using the paddle attachment whisk till the sugar melts and the mix is pale yellow.
Then add the dry ingredients and tutti-frutti.
Whisk till the mix is crumbly.
Add a couple of tablespoons of milk and bring the dough together. Add more milk only if required.
Transfer the dough on to a cookie sheet. Knead for a few seconds.
Divide the dough into half and roll each piece into a log of about 2-3 inch diameter.
Wrap them tightly in plastic wrap and refrigerate for 4-5 hours or freeze for 45 minutes.
Preheat the oven to 350 F. Remove the dough logs and unwrap them. Cut evenly into discs. I like to keep them ¼ inch thick.
Arrange the discs on the cookie sheet leaving an inch on each side.
Bake the cookies for 15-17 minutes. Mine took 17 minutes to form crisp edges.
Remove the cookies and let them cool. Transfer to an airtight container and enjoy!