Butter Pecan Pound Cake

Name: Butter Pecan Pound Cake
Ingredients: 4 large eggs; 3/4 cup sour cream; 2 sticks (8 ounces) plus 2 tablespoons salted butter, divided; Cooking spray or butter, for coating the pan; 1 1/2 cups pecans (6 ounces); 2 cups plus 1 tablespoon all-purpose flour, divided, plus more for the pan; 1 1/3 cups plus 1 teaspoon packed dark brown sugar, divided; 1/2 teaspoon ground nutmeg; 1 1/2 teaspoons baking powder; 2 teaspoons vanilla extract; 1/2 teaspoon kosher salt; 4 tablespoons (1/2 stick) salted butter; 3 tablespoons packed dark brown sugar; 1 tablespoon water; 1/4 cup powdered sugar; 1 tablespoon milk or cream; 1 tablespoon bourbon; 1/2 cup pecans (2 ounces); Flaky salt, for sprinkling (optional)