makes about 30 cookies
Preheat oven to 350°F. Cream the butter with the brown sugar until light and fluffy. Slowly add in the maple syrup, beating well to encourage the butter to absorb it. Mix in the egg and vanilla.
In a separate bowl, whisk the flour, baking soda, salt, cinnamon, and nutmeg then sprinkle into the butter. Add the oats, raisins, chocolate chips, and walnuts.
Scoop about 2 tablespoons per cookie and arrange with some room to spread, 8 on a standard sheet pan lined with parchment or Silpat. Press to flatten slightly and bake for 12–15 minutes until you notice the aroma and the cookies begin to turn golden brown.
to toast walnuts: 350° for about 10 minutes. Keep them in a jar at room temperature and use on yogurt, cereal, salads, and in baking.
Dough keeps well in refrigerator for 3–5 days, freeze for longer storage.
Bake from frozen 15 minutes.