Heat oven to 350°F/180°C.
In medium bowl, mix flour, baking soda and ½ teaspoon salt. Set aside while you continue next steps.
In a large bowl, cream butter and sugars until light and fluffy. This will take about 3 minutes by hand or 1 minute with an electric mixer.
Scrape down the sides of the bowl and beat in the butterscotch pudding. Then beat in the eggs one at a time until smooth. Stir in the vanilla.
Slowly stir the flour mixture into the wet ingredients until the dough is smooth and you can no longer see any traces of flour.
Add the butterscotch chips and fold to distribute.
Drop tablespoons of the biscuit dough onto your prepared sheet, spacing them 2 inches apart.
Bake the biscuits for 9 minutes until they are puffed and golden. The cookies will deflate once cooled. Cook for an additional 1 - 2 minutes if you want a crispier biscuit.
Remove from the oven let the cookies rest for 5 minutes on the sheet, then transfer to a cooling rack for another 5 - 10 minutes.
Sprinkle some sea salt onto the warm biscuits to finish.