Preheat oven to 350 degrees and prepare a baking sheet with parchment paper.
Stir together oats, flour, wheat germ, baking soda, baking powder, cinnamon, and salt in a large bowl and set aside.
Put butter and sugars in the bowl of an electric mixer fitted with the paddle attachment. Mix on medium speed until pale and fluffy, about 5 minutes.
Mix in eggs and vanilla until combined.
Add dry ingredients and mix until just combined.
Stir in raisins (and walnuts if you are using them).
Using a 2" Cookie Scoop, drop dough onto baking sheets about 2" apart. Bake about 14 minutes, rotating the baking sheet halfway through.
Take cookies out of the oven. The cookies should be golden and look a little underdone in the center. Let cookies cool on baking sheets.