
Place tequila in a jar or cup. Then, add in a couple of slices of jalapeños plus the seeds. Let sit for at least 30 minutes so that the tequila can get infused with the spice.
Add 1 to 2 cups of ice to a cocktail shaker and then pour in the infused tequila. Add the rest of the ingredients. Option to add more simple syrup, depending on your preference.
Give the shaker a good shake so that everything gets mixed together.
Serve over ice with fresh grapefruit slices, jalapeño slices, and a salty rim.