Applesauce

Bahan-bahan (8 porsi)

• 4 pounds apples (about 10), (peeled, cored and cut into 1-inch (2.5-cm) chunks (see note))
• 3 tablespoons unsalted butter, (cut into ¼-inch (6-mm) chunks)
• ¼ cup plus 2 tablespoons (packed) light or dark brown sugar
• Ground cinnamon, (for serving (optional))