Any HEALTHIER Vanilla Fudge Recipes?

I'm a diabetic who has a guilty love of vanilla fudge!
I'm looking for a recipe for vanilla fudge using healthier, alternative ingredients. Lower in carbs and sugar is ideal. Can you use Splenda in fudge?
I don't like chocolate, so no chocolate fudge recipes please.

The more the merrier. Thanks!
Update: I don't have a candy thermometer.
Any recipes that you simply mix together and allow to harden in the fridge or on the counter?
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