Step 1: Prepare Butter Mixture

Preheat oven at 350F. Line the bottom of the baking sheet with parchment paper. In a large bowl add butter, brown sugar, white sugar, eggs, vanilla extract and beat well.

Step 2: Prepare Cake Batter

To make cake batter, in a medium bowl mix the flour, salt, baking soda and cinnamon. Then add the flour mixture to the butter mixture and beat until incorporated. Then add raisins and chopped walnuts and mix it well. Then add oats and mix it well.

Step 3: Bake And Serve The Oatmeal Cookies

Drop batter by scoop onto baking sheet, flatten cookies slightly with spoon. Bake the cookies for about 10 minutes or until light golden brown. Remove cookies from oven and transfer them to a wire rack to cool. Serve!