Preheat your oven to 350°F (175°C). Line a baking sheet with parchment paper.

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

In a large mixing bowl, cream together the softened butter, brown sugar, and granulated sugar until light and fluffy, about 2-3 minutes.

Add the vanilla extract and eggs, one at a time, mixing well after each addition.

Gradually add the dry ingredients to the wet ingredients, mixing until just combined.

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

Drop rounded tablespoons of dough onto the prepared baking sheet, spacing them about 2 inches apart.

Bake in the preheated oven for 10-12 minutes, or until the edges are lightly golden.

Remove from the oven and let the cookies cool on the baking sheet for 5 minutes before transferring them to a wire rack to cool completely.