Originally Posted by
PUMP
If I remember my chemistry, anything soluble in water (including alcohol) lowers the freezing point. Freezing point of 100 proof (50% alcohol) is around 0-degrees F. (Alcohol was used as antifreeze in early water cooled autos (pre 1935). Sugar is very similar to alcohol when desolved in water. So, Margaritas with 15 to 20% alcohol should start to freeze around 15-degrees or so.
Any way, if you want low sucrose Margaritas use one part lime juice, one part orange liqueur (like triple sec) and one part tequila. That way the only sugar is fructose and it is a fairly low amount. I have type 2 diabetes and seem to be able to handle fructose a lot better than sucrose.
Popsicles are water, sugar and food coloring, they freeze around 20-degrees.