Line a baking sheet with parchment paper and set aside.
In a large pan brown the butter: Cook over medium heat until golden, you’ll feel a toasted nut aroma. Remove from heat and let cook.
Beat browned butter with sugar, brown sugar and vanilla extract. Add egg and beat until fluffy.
Incorporate the flour. Fold in the butterscotch chips and walnuts.
Scoop out a ball of dough and place in a cookie sheet. Swirl some butterscotch sauce on top if you want and put in the oven.
Bake for 12 minutes. Remove from the oven and let cool in the pan for around 10 minutes before serving them.
*I am aware that my nutritional info is WAY off and I'm not sure why. My previous recipe card had this info:Serving: 1 | Calories: 115 | Carbs: 15 g | Protein: 1 g| Fat: 6 gSaturated Fat: 3 g | Polyunsaturated Fat: 2 g | Cholesterol: 18 mg Sodium: 43 mg | Sugar 8 gI also like to add a swirl of butterscotch sauce to the top of the cookies because for me butterscotch sauce is life. But, you can skip that step or even swirl some melted chocolate or jam. Browning butter is a super easy trick that infuses a lot of flavor into your baked goods. Just melt butter in a pan and cook for around 20 seconds or until it becomes slightly golden and smells like baked nuts.I highly advise you to chop your walnuts into tiny pieces that way you get a couple of walnut pieces in every bite resulting in a super crunchy cookie.