Add the flour, salt, and butter to the bowl of a stand mixer with the dough hook attached. Begin stirring it on low, then slowly add the hot water. Allow the dough to mix on a medium speed for 5 minutes.
Remove the dough onto a floured surface and knead it for 5 minutes. Place the dough back into the bowl and allow it to rest, covered for 20 minutes.
After the rest, divide the tortillas into even pieces. I prefer to make 8 medium sized tortillas or 16 small tortillas. Keep the dough covered with a towel as you roll and cook to ensure the dough does not dry out.
Begin heating a skillet over medium heat. Roll the dough balls into very thin circles, one at a time. Add the rolled dough onto the hot, greased skillet. Allow it to cook on each side for 20-30 seconds, until both sides have small golden brown spots.
Place the tortillas on a towel-wrapped plate to keep them warm for serving.