In a small pot, combine all the ingredients and whisk over medium heat until the sugar completely dissolves. Remove the jalapeño pieces and then blend the mixture well. Strain into a large jar. Allow to cool before use.
Salt the rim of a small glass. Add ice, 1 shot of tequila, 1/2 shot of triple sec, and then fill with the sweet heat margarita mix (approx. 2 shots). Enjoy!