Adjust to your preferred spice level. I found 3 jalapeno slices were perfect for two cocktails.
Use the back of a spoon to muddle the ingredients together if you don't own a muddler.
If you want to salt your rim, this cocktail tastes great with a chili rim, such as Tajin. Before adding ice to the glass, use a lime wedge to moisten the rim and then dip in salt or Tajin. Pour in ice and cocktail as instructed.