RE: "Thoughts on low iron and "toddler" formulas" X-post with Feeding
DS never acquired the taste for juice either, so I know how that goes. It makes it hard to sneak stuff into him that way ;)
For smoothies, you can make them as easy or complicated as you wish. We often do yogurt+some frozen organic berries and enough water/milk to make it blendable. She may like it thicker or thinner, and if she won't drink them that way, Logan will sometimes eat it if I put it into a pyrex container, freeze, and then scrape some into a bowl and call it ice cream ;)
For non dairy, you can just do orange juice and strawberries or blueberries, or OJ and banana, or rice milk and banana or berries for example. Frozen fruit makes it thicker so you can freeze the bananas first if she likes it that way.
If you want to add more stuff, you could try grinding flax seeds in the blender first, then adding your usual stuff. If you want to sweeten it, add some maple syrup or we use xylitol sometimes (I think we talked about xylitol before?) for Logan's teeth.
Other smoothie add-ins around here are our probiotics and hemp oil (more bio available than flax oil), as well as pharmaceutical-grade sodium ascorbate (especially this time of the year). You could add a little of her iron supplement if you go that route or a few drops of floradix.
To start though, just try it w/ some sort of dairy sub like rice milk and frozen berries or frozen banana. Play with how thick (add small amounts of water to thin it at a time) she likes it. If she won't drink a smoothie (like my DS most of the time!!) try freezing it into a popscicle mold (probiotics should still survive freezing) or scraping it sorbet-style after freezing in some sort of container :)
Mama to DS-2004
DD-2006
and a new addition-ds born march 2010