1/2 pound (2 sticks) unsalted butter, at room temperature
3/4 cup light brown sugar, lightly packed
3/4 cup granulated sugar
2 teaspoons pure vanilla extract
2 extra-large eggs, at room temperature
1 3/4 cups all-purpose flour
1 teaspoon baking soda
1 teaspoon kosher salt
1 1/4 cups old-fashioned oats, such as Quaker
3/4 pound bittersweet chocolate, such as Lindt, chopped in chunks
3/4 cup dried cranberries
Fleur de sel