Fresh is best here. I use these:
- 2 oz. tequila blanco or reposado
- 1 oz. fresh lime juice
- 3/4 oz. orange liqueur like Cointreau or Triple Sec
- 1/2 oz. simple syrup or agave syrup
- 2-3 fresh jalapeno slices seeds out if you want it milder
- Ice cubes
- For the rim I go with coarse salt and a lime wedge.
Want more heat? Just toss in extra jalapeno. I usually taste a slice first, just to keep the spice in check.