Can Splenda be substituted for regular sugar when making your own sweetened condensed milk? Can you substitute Splenda for the regular sugar in making your own sweetened condensed milk
The answer is yes.  I found this link for you from Genius Kitchen 
https://www.geniuskitchen.com/recipe/sweetened-condensed-milk-with-splenda-412496

There are many recipes for both low carb and diabetic friendly Sweetened condensed milk.

Also the following:  https://www.yummly.com/recipes/sweetened-condensed-milk-with-splenda