Preheat oven to 325 degrees.

Line your baking sheet(s) with parchment paper.

Whisk together flour, baking soda and salt in a bowl and set aside.

In your mixing bowl, cream together the butter and the sugars.

Add in the egg, yolk, corn syrup and vanilla and mix for 2-3 minutes or until nice and fluffy.

Add in the flour mixture and mix until blended.

Add in the oats and the raisins and mix just until incorporated.

Use a small cookie scoop or a tablespoon and drop dough onto the parchment paper lined baking sheets spacing 2 inches apart.

Bake on the center rack (or upper and center...switching halfway) for 13-16 minutes or until the edges have just started to crisp up (longer or shorter depending on how you enjoy them).

Remover cookies from oven and allow them to firm up on the baking sheets for 2 minutes before moving them to a cooling rack.

Once cookies are completely cool store in a cookie jar or air-tight container.