Cinnamon Sugar Peach Upside Down Skillet Cake

Name: Cinnamon Sugar Peach Upside Down Skillet Cake
Prep time: 20 min
Cook time: 30 min
Total time: 50 min
Cuisine: American
Ingredients: 1 3/4 sticks (14 tablespoons) salted butter; 1/2 cup plain greek yogurt or sour cream; 3 large eggs, at room temperature; 1 1/2 cups granulated sugar; 1 tablespoon vanilla extract; 1 cup whole milk, at room temperature; 2 3/4 cups all purpose flour; 1 1/2 teaspoons baking powder; 1 tablespoon plus, 1/2 teaspoon cinnamon; 1/2 teaspoon kosher salt; 4 peaches, thinly sliced; 1/2 cup heavy cream; 1 tablespoon bourbon ((optional))