It turns out that tortillas are non-conducting, which was my first obvious test. I didn't want to short out everything. I was actually surprised by this, as I would have thought that the moisture in the tortilla might cause a short circuit. Have no fear, the Tortilla-Board™ is electrically safe enough for my purposes. You might need to experiment with higher power circuits, and I make no claims about the safety of using the Tortilla-Board™.