Hi Island Girl

It is lactitol..

The ingredients on the package are:

Reese sugar free peanut butter cups:
lactitol, peanuts, chocolate, cocoa butter, cornstarch, peanut oil, milkfat, contains less than 2% of polydextrose, partially hydrogenated soybean and cottonseed oils, salt, cream, soy lecithin, and pgpr, as emulsifiers, natural and artificial flavor, tbhq, a preservative, and sucralose.

Nutition facts:
serving 5 pieces
calories 170 from fat 110
total fat 12g
cholesterol less than 5mg
sodium 125mg
total carb 25g
figer 1g
sugar 0g
sugar alcohol 19g
protein 2g

sugar free hersheys with almonds:
lactitol, chocolate, cocoa butter, almonds, cream, polydextrose, milkfat, containse less than 2% of soy lecithin, and PGPR as emulsifiers, vanillin, an artificial flavor, and sucralose.

Nutririon facts:
servin 5 pieces
calories 180, from fat 130
total fat 14g, sat 7g
cholesterol 5mg
sodium 10mg
Total carb 23g
fiber 3g
sugars 0
sugar alcohol 19g
protein 2 g

Hope this helps....

Mark