Soft Buttery Cinnamon Rolls

Name: Soft Buttery Cinnamon Rolls
Prep time: 20 min
Cook time: 25 min
Total time: 45 min
Ingredients: 3/4 cup cold unsalted butter (cubed); 3/4 cups brown sugar (packed); 1½ teaspoon salt; 2 Tablespoons vanilla extract; 1½ cups whole milk (3.25% homogenized); 7¾ cups bread flour; 2¼ teaspoons instant yeast (1 package); 5 large eggs (room temperature); 1 cup unsalted butter; 1½ cups brown sugar (packed); 3 Tablespoons ground cinnamon; 1 teaspoon salt; 3 cups powdered sugar; 3/4 cup heavy cream (or whole milk); 2 Tablespoons vanilla extract (or 1 package vanilla sugar); 1/2 cup unsalted butter (for brushing) (melted)