Preheat your oven to 350°F (175°C).

In a large bowl, cream together the softened butter, granulated sugar, and brown sugar until light and fluffy.

Beat in the eggs one at a time, mixing well after each addition, then stir in the vanilla extract.

In another bowl, whisk together the flour, baking soda, and salt.

Gradually add the dry mixture to the wet mixture, stirring until just combined.

Gently fold in the oats, chocolate chips, and pecans until evenly distributed.

Drop rounded tablespoons of dough onto a baking sheet lined with parchment paper, leaving enough space between each cookie.

Bake for 10-12 minutes or until the edges are golden. Allow to cool on the baking sheet for a few minutes before transferring to a wire rack.