Looking for the best DIY piping bag tip? Skip the nozzle and go all in on a plastic bag that pipes smooth lines and round ...

A baker piping icing onto a layer cake - Mariia Siurtukova/Getty Images ...

But when you set former BA staffer Claire Saffitz loose in the test kitchen with the directive to make a gourmet version of Kellogg’s classic toaster pastry ... is royal icing, which hardens ...