This recipe calls for ½-1 tsp of yellow curry powder. I personally like a full teaspoon because I really like the flavour. You can definitely use grocery store curry powder but I really do prefer a nice quality curry powder. In Toronto, it is easy to find <a href="http://www.arvindas.com" data-mce-href="http://www.arvindas.com">Arvinda's Indian spice blends</a> which is what I use here. They never disappoint.