¾ cup (167 g) salted butter, softened ¾ cup (160–200 g) dark brown sugar, packed (use dark for richer flavor) ¼ cup (60 g) granulated sugar 1 large egg 1 tablespoon (15 ml) canola or neutral oil 1 tablespoon (15 ml) vanilla extract 1½ cups (190 g) all-purpose flour 1½ tablespoons (12 g) cornstarch 1 teaspoon baking soda ½ teaspoon salt 1 teaspoon ground cinnamon ¼ teaspoon freshly grated nutmeg ¼ teaspoon ground cardamom (or substitute ground ginger) 1½ cups (150 g) old-fashioned rolled oats ½ cup (90 g) semisweet chocolate chips ½ cup (90 g) butterscotch chips ⅓ cup (50 g) raisins ⅓ cup (45 g) chopped walnuts or pecans Preheat the oven to 350°F and line two baking sheets with parchment paper or silicone liners. In a large bowl, beat ¾ cup (167 g) salted butter with ¾ cup (dark brown sugar) and ¼ cup (granulated sugar) until light and fluffy, about 2 minutes. Add 1 large egg, 1 tablespoon of canola oil, and 1 tablespoon of vanilla extract, mixing until smooth and we...