I added 1/8 tsp of lemon extract to make the cookies more lemony, and I upped the lemon powder to 3-4 tbsp since I like tangy stuff. I may omit the vanilla extract next time since I don't think it adds much to this recipe. The cookies came out really good, now I know how to satisfy my lemon craving. Next I will try making a lime version. You can find lemon and lime powder online, I got mine on ebay.