Mug Apple Pie Recipe - Make your own delicious apple pie in a mug! Ingredients include 1 can apple pie filling, 1/4 cup all-purpose flour, 3 tablespoons old fashioned oats, 3 tablespoons dark brown sugar, 2 tablespoons pecan chips, 1/4 teaspoon ground cinnamon and 2 tablespoons butter. It's a great dessert to satisfy your sweet tooth!