Set the oven to 350°F (175°C).
In a large bowl, whisk together flour, oats, baking soda, baking powder, and salt.
In another large bowl, beat sugar and shortening until smooth and creamy. Add in molasses, beaten eggs, and vanilla; continue beating. Gradually beat in the flour mixture until combined. Stir in walnuts and raisins.
Using a cookie scoop, drop dough onto ungreased baking sheets.
Bake for 10 to 12 minutes or until slightly browned. Let the cookies cool on the baking sheet for 5 minutes before transferring them to a wire rack to cool completely.
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