• Preheat oven to 350° and line a 13x9 pan with foil. Grease the foil and set aside.
• In a small bowl, combine flour, oats, and salt. Set aside.
• Put the butterscotch chips in a large bowl.
• Heat butter in a small saucepan over medium-low heat until nutty brown in color. About 10 minutes. You'll see a definite change- it will go from bubbling and noisy to foaming and quiet. I stir with a whisk regularly to prevent burning.
• Pour over butterscotch chips and stir until chips are completely melted and smooth.
• Stir in sugar and mix until dissolved.
• Add the vanilla and the egg and mix well.
• Stir in the flour mixture.
• Spread into prepared pan and bake for 18-20 minutes.

Glaze

• In a microwavable bowl or measuring cup, mix the water and brown sugar.
• Microwave for 30-60 seconds or until it starts to just boil.
• Add the butterscotch chips and stir until completely smooth.
• Pour over warm bars.
• Let fully cool before cutting- at least 2 hours, overnight if possible.
• Remove bars using the foil and cut into squares.