Oatmeal Waffles with Allspiced Apple Butter

Name: Oatmeal Waffles with Allspiced Apple Butter
Ingredients: 2 cups buttermilk; 1/4 cup orange juice; 2/3 cup quick-cooking rolled oats; 1 egg; 2 tablespoons packed light brown sugar; 1/2 cup all-purpose flour; 1/2 cup whole wheat flour; 1 1/2 teaspoons baking soda; 1/2 teaspoon salt; 2 tablespoons melted butter, plus more for cooking; Allspiced Apple Butter, recipe follows; Whipped cream, for garnish; Fresh berries, for garnish, optional; 5 pounds apples, like MacIntosh or Ida, peeled, cored, and cut into 1/2-inch chunks; 1 pound light brown sugar; 2 teaspoons cinnamon; 1 teaspoon ground allspice, preferably freshly ground