We've got all the tips and tricks you need to keep your doughnuts fresh. Related ... or stuffed with a filling of jelly, jam, cream, or custard. One of the most common doughnut types is yeast.

Use a skewer to make a hole in the side of each doughnut, wiggling around a bit to enlarge it slightly. Put the jam into a disposable piping bag and snip the corner. You can also put into a piping ...