Preheat a Blackstone grill or a griddle over medium high heat.

Open up each of the hot dogs buns and roll them with a rolling pin to flatten them out.

Slice each hot dog in half lengthwise so that they lay flat on the grill but they’re still connected.

Add the butter to the grill or griddle. Allow it to melt and spread it out onto the grill.

Place all the hot dog buns onto the griddle. Top the buns with 1 cup of the shredded Monterey Jack cheese and shredded cheddar cheese evenly.

Place the hot dogs on the griddle next to the buns, flat side down.  Grill for a minutes until they start to brown.  Flip and cook the other side for 1-2 more minutes until it starts to brown as well.

Place the hot dogs onto each bun (on one side) and top with the remaining shredded cheese evenly.

Close the hot dog buns and continue to cook until all the cheese is melted.

Serve warm with ketchup and mustard.  Enjoy!