Preheat your oven to 350 degrees F (180 degrees C).
Melt Butter (2/3 cup) in a saucepan over low heat. Cool for 10 minutes. Pour melted butter into large bowl.
Stir in Brown Sugar (2 1/4 cup) and then beat with an electric mixer until smooth.
Add Egg (3) and beat until smooth.
In a separate, medium-sized bowl, mix All-Purpose Flour (2 2/3 cup), Baking Powder (2 1/2 teaspoon) and Salt (1 teaspoon).
Combine dry ingredients with butter mixture.
Add Butterscotch Chips (6 ounce).
Add Chopped Pecans (1 cup), stirring until completely mixed.
Spread batter evenly into a greased 15 by 10-inch pan or glass baking dish.
Bake in the preheated oven for about 20 minutes, or until a toothpick inserted into the deepest part comes out clean.
Cool blondies in pan. Cut into 2-inch by 2 1/2-inch bars.
Transfer to a nice serving plate. Yummy!