FOR THE STICKY BUN DOUGH: – 1 cup whole milk – 1/2 cup unsalted butter – 1/2 cup plus 1 Tablespoon sugar, divided – 2 1/2 teaspoons (one 3/4-oz.) packet active dry yeast – 4 1/4 cups all-purpose flour, plus more for rolling out dough – 2 large eggs, at room temperature – 1 teaspoon ground cinnamon – 1 teaspoon kosher salt FOR THE FILLING: – 3 Tablespoons unsalted butter, melted – 1 cup packed light brown sugar – 1/4 cup sugar – 1 1/2 Tablespoons ground cinnamon FOR THE TOPPING: – 2 cups pecan – 1/2 cup unsalted butter – 3/4 cup packed light brown sugar – 1/4 cup whole milk – 1/4 cup maple syrup – 1/2 teaspoon kosher salt