Cream together butter, sugars, egg, water and vanilla using electric mixer at medium speed. Mix until light and fluffy.
Combine flour, soda and cinnamon. Add to creamed mixture, mixing on low speed until blended. Stir in oats and raisins.
Drop dough by heaping tablespoons full onto greased baking sheets. Press them flat if you want a crisp cookie, or leave them rounded if you like a chewier cookie.
Bake at 350° for 12-15 minutes only until edges of cookies are golden brown.