Name: Salted Butterscotch Oat Bars
Prep time: 15 min
Cook time: 25 min
Total time: 40 min
Yield: 1 (9 by 13-inch) pan, about 32 servings (I make 3 cuts the long way and 7 cuts the short way)
Ingredients: ¾ cup (160 g) lightly packed light brown sugar; 12 tablespoons (170 g) unsalted butter, at room temperature, plus more to grease the dish; 1 large egg; 2 teaspoons pure vanilla extract; 2 cups (255 g) all-purpose flour; 2¼ cup (180 g) old-fashioned rolled oats, divided; ½ cup (55 g) toasted walnuts, chopped; ¾ teaspoon fine salt, divided; ½ teaspoon baking powder; ¼ teaspoon ground cinnamon; 1 (14 oz/396 g) can sweetened condensed milk; 1 (11 oz/311 g)) bag butterscotch chips; Sea salt (such as fleur de sel), for sprinkling on top