Preheat oven to 350 degrees F. Sift together flour, baking soda, cinnamon and salt onto waxed paper. Beat together sugar, butter and vanilla at low mixer speed for 1 minute. Scrape down side. Increase speed to high; beat 3 minutes. Reduce speed to moderate. Beat in eggs, one at a time. Beat in milk. Gradually beat in flour mixture. Stir in oats, raisins, and walnuts. Drop dough by slightly rounded teaspoons, 2 inches apart, onto greased baking sheets.
Bake in preheated 350 oven for 8-10 minutes or until lightly browned around edges; cookies will not be firm. Cool on baking sheet on wire rack for 1 minute. Transfer to wire rack to cool completely. Store in airtight containers.