In a separate bowl sift together Flour, Baking Powder and Salt. Slowly add to butter mixture. Work to create a smooth dough. Do not over-work dough or cookies will be tough.
Add to batter Cinnamon, Raisins and optional Walnuts and incorporate.
Scoop cookie batter with small ice cream scoop and place on parchment-lined sheet pan and bake in a 350℉ oven for 12-15 minutes or until lightly browned.