Preheat the oven to 350 F. Line a 12 cup muffin pan with paper liners. In a medium bowl, whisk together flour, salt, and baking soda. In a large bowl, combine butter with sugar until smooth.
Add in the flour mixture, mix until it is fully combined. Fold in the butterscotch baking chips. Evenly divide the cookie dough between the paper liners. Bake for 12-15 minutes.