After this, add them to a saucepan with the sugar and water.
Place the pan on a medium heat and bring it to a boil. Let it boil for about 1 minute, then take it off the heat, and let it steep. Leave the syrup cool down before adding it to the mix.
Your spicy margarita syrup is ready!
Make sure not to add more than a tablespoon of this syrup to the Costco margarita mix. Have fun, and don't overdo it!