Preheat oven to 350 degrees. Line a 9X13 baking dish with parchment paper. Combine melted butter, brown and white sugar in a bowl. Mix with spoon.
Next add in, eggs, vanilla, salt, baking powder and flour. Continue to mix with a spoon until combined. Next fold in butterscotch chips and pecans. I didn't use a mixer when I made this and it worked really well.
Next press mixture into your 9X13 dish. Bake for 25-30 minutes or until center test done. These are a mixture between a brownie and a piece of cake
Notes
Please check these blondies around 25 minutes as all oven vary.