‘Tis the season for everything pumpkin, everything cinnamon, and everything…apple! This doughnut recipe  from Ina Garten is one of my absolute favorites, so why not mix it up by adding a little bit of apple cider flavor? The key here is to boil the cider to get a very concentrated and tangy apple flavor. Start by boiling 1 and 1/2 cups of cider down until…