First, let’s start with the bad news: if you want to do it right, you’re going to have to find a 3D Printer.
If you want to do it like a lazy person (don’t worry, that’s us too), you’ll just need to do some extra folding.
After that, the rest is cake (or, doughnut). Here’s what you’ll need to do, as told by the great Inventor Of The Taconut™, Redditor barryabrams.
All you need is pastry dough, fying oil, and, well, whatever you like in your tacos.