Yes you can, and I would! Walmart sells a good organic vegan sugar, it tastes great and isn’t too expensive. It’s called Florida Crystals.
http://www.floridacrystals.com/
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I have no idea why you would want to use Splenda, it causes health problems, plus does animal testing. if you do not want to use vegan sugar, you could use Stevia or agave nectar if you do not want to use vegan sugar.
http://veganarch.blogspot.com/2008/03/ve…
http://dcfud.smorgasblog.com/archives/00…
http://www.youtube.com/watch?v=6079M5nPt…
http://en.wikipedia.org/wiki/Splenda#Saf…
http://splendatruth.com/
http://www.sweetdeception.com/
http://www.splendaexposed.com/
http://www.pureinsight.org/pi/index.php?…
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i wouldnt use splenda at all.. any synthesized sugar is bad!!!! u should do a little research about it, especially aspartame