Preheat your oven to 350°F (175°C) and line two baking sheets with parchment paper.

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

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

Add the eggs one at a time, mixing well, then blend in the vanilla extract.

Gradually mix the dry ingredients into the wet mixture until just combined.

Fold in the butterscotch chips and chocolate chips until evenly distributed.

Scoop out dough portions and place on the prepared baking sheets, spacing 2 inches apart.

Bake for 10-12 minutes or until the edges are golden brown and the centers are soft.

Allow the cookies to cool on the baking sheet for a few minutes before transferring to wire racks.