01 - Preheat the oven to 350°F. Line two baking sheets with parchment paper.
02 - In a medium bowl, whisk together all-purpose flour, baking soda, salt, ground cinnamon, nutmeg, and cloves. Set aside.
03 - In a large bowl, use an electric mixer to cream unsalted butter, light brown sugar, and granulated sugar until the mixture is light and fluffy.
04 - Add eggs one at a time, beating well after each addition, then mix in the vanilla extract.
05 - Gradually add the prepared dry ingredients to the wet mixture and mix until just combined.
06 - Stir in rolled oats, raisins, and chopped walnuts or pecans with a spatula until evenly distributed.
07 - Drop rounded tablespoons of dough spaced 2 inches apart onto the lined baking sheets.
08 - Bake for 10 to 12 minutes, or until the edges are lightly golden and the centers appear just set.
09 - Allow cookies to cool on the baking sheet for 5 minutes, then transfer to a wire rack and cool completely.