One-Bowl Apple Cranberry Upside-Down Cake

Name: One-Bowl Apple Cranberry Upside-Down Cake
Prep time: 20 min
Cook time: 40 min
Total time: 1 h
Cuisine: American
Ingredients: 2 medium firm baking apples, such as Granny Smith or Jonagold; 4 tablespoons (1/2 stick) unsalted butter, plus more for the pan; 1/2 cup packed light brown sugar; 3/4 teaspoon ground cinnamon; 1/2 teaspoon kosher salt; 1 1/4 cups fresh or frozen cranberries (do not thaw); 1 cup granulated sugar; 3/4 cup sour cream; 1/2 cup vegetable oil or 8 tablespoons (1 stick) melted unsalted butter; 1 large egg; 1 large egg yolk; 2 teaspoons vanilla extract; 1 1/2 teaspoons baking powder; 3/4 teaspoon kosher salt; 1 1/2 cups all-purpose flour; Vanilla ice cream, for serving