Rich Lemon Cake with Lime Cream Cheese Frosting

Name: Rich Lemon Cake with Lime Cream Cheese Frosting
Ingredients: Lemon Cake; 1 cup (2 sticks) unsalted butter, melted and cooled; 4 1/2 cups cake flour; 1 1/2 teaspoons baking powder; 1/2 teaspoon salt; 3 1/4 cups sugar; 6 lemons, zested; 4 eggs; 1 1/3 cups heavy cream; 4 tablespoons dark rum; Lime Cream Cheese Frosting; 1/2 cup (1 stick) unsalted butter, at room temperature; 16 ounces (1 lbs) cream cheese, at room temperature; 1 teaspoon salt; 1 lime, zested and juiced; 6 cups powdered sugar