Preheat your oven to 350°F (175°C) and line two baking sheets with parchment paper.
In a large mixing bowl, beat the softened butter, brown sugar, and granulated sugar together until the mixture is light and fluffy.
Add the eggs one at a time, mixing well after each addition, then stir in the vanilla extract.
In a separate bowl, whisk together the flour, baking soda, and salt. Gradually add this dry mixture to the wet ingredients, stirring until just combined.
Fold in the butterscotch chips and chopped pecans until evenly distributed throughout the cookie dough.
Using a cookie scoop or tablespoon, drop rounded balls of dough onto the prepared baking sheets, leaving space between each for spreading.
Bake in the preheated oven for 10-12 minutes, or until the edges are golden and the centers look slightly underbaked.
Remove the cookies from the oven and let them cool on the baking sheets for 5 minutes before transferring them to wire racks to cool completely.
Notes
Serve the cookies warm with a drizzle of melted butterscotch on top and a sprinkle of chopped pecans for an extra touch!