Preheat your oven to 350°F (175°C). This ensures that the cookies bake evenly and come out perfectly golden.
In a large mixing bowl, cream together the shortening, light brown sugar, and granulated sugar until the mixture is light and fluffy.
Beat in the well-beaten eggs and vanilla extract. Mix until everything is fully combined.
In a separate bowl, whisk together the all-purpose flour, salt, baking soda, and ground cinnamon.
Gradually add the dry ingredients to the wet mixture, stirring until just combined.
Gently fold in the old-fashioned oats and your choice of chopped walnuts or raisins.
Using a cookie scoop or tablespoon, drop heaping spoonfuls of dough onto a parchment-lined baking sheet.
Bake in the preheated oven for 10-12 minutes, or until the edges are lightly golden.
Allow the cookies to cool on the baking sheet for about 5 minutes before transferring them to a cooling rack.
