Excellent burger tips MD (keeping with CG's notation ). Although very popular, jalapeno peppers really are not that hot. For a spicier and smokier taste sensation, try using smoked jalapenos, usually called chipotles. The have about twice as much heat and, as one would surmise, as smoky flavor. They usually come in little cans with some sauce and a little goes a long way. If you do a search for Scoville Heat Index you'll find a listing of the relative spiciness of many different peppers.