Preheat your oven to 350°F (175°C). This ensures that your cookies bake evenly.
In a large mixing bowl, cream together the softened butter and brown sugar until light and fluffy. This should take about 2-3 minutes.
Beat in the egg, followed by the milk and vanilla extract. Mix until well combined.
In a separate bowl, whisk together the flour, salt, and baking soda. Gradually add this dry mixture to the wet ingredients, mixing until just combined.
Gently fold in the chocolate chips, butterscotch chips, and chopped pecans. Make sure they are evenly distributed throughout the dough.
Using a cookie scoop or tablespoon, drop rounded balls of dough onto a baking sheet lined with parchment paper, leaving enough space between each cookie for spreading.
Bake in the preheated oven for 10-12 minutes, or until the edges are lightly golden. The centers may appear slightly underbaked; they will continue to cook on the baking sheet.
Allow the cookies to cool on the baking sheet for about 5 minutes before transferring them to a wire cooling rack. Enjoy them warm or store them for later!
