A grapefruit and tequila cocktail with jalapeno simple syrup, ice, and plain sparkling water. The syrup is a separate batch; only one ounce goes in the glass.
The syrup is a batch ingredient; only 1 fluid ounce is used per cocktail. Its yield varies, so no exact leftover portion count is promised. Custom time allows 10–15 minutes steeping and around 30 minutes cooling. With prepared cold syrup, assembly takes about 5 minutes. Use plain sparkling water and ice.