Betty's Famous Cinnamon Rolls
1 cup butter, melted, divided 1 cup warm milk 1 cup warm water (110 degrees F/45 degrees C) 1 teaspoon maple-flavored extract 1 teaspoon white sugar 1 ½ cups white sugar 2 cups pecan halves 2 eggs 2 teaspoons salt 2 teaspoons vanilla extract 3 tablespoons ground cinnamon 4 cups confectioners' sugar 4 ½ teaspoons active dry yeast 8 cups all-purpose flour, divided ⅓ cup white sugar ⅔ cup butter, melted ⅔ cup white sugar