Combine all ingredients in blender and process until smooth.
Pour into popsicle molds and freeze for at least 5 hours before unmolding.
To make simple syrup bring ¼ cup of sugar, and a ¼ of a cup of water to a simmer, until all the sugar dissolves. Let cool completely. Tajin chile powder can be found at most Mexican grocery stores and some Wal-Mart´s.