Home made Rice Milk that's not slimy or chalky?

Since I'm not sure how to re-post as my guest account, I just want to say that I tried a little variation after reading logophobe's answer stating that he thought an added oil would counteract the chalkiness.

I toasted the rice grains (as the linked article stated) before soaking them, and then after blending, I strained the resulting milk once, and then threw the strained liquid back in the blender and added some canola oil, and the result was a MUCH better texture overall.

I didn't have Xanthan or Guar gum on hand to try, so I'm still yet to see how the mixture will hold up in the fridge, and if stirring will be enough to keep it this texture.

It definitely needed some sort of sweetener still though (in my opinion, but that's probably up to preference), but I feel like the oil, and possibly the toasting, really affected the texture in a positive way, to where it's a much more palatable base.

As you identify, the addition of oil will most certainly affect the final texture of the rice milk. Any fats have a "smoothing" effect on texture which would most likely counteract the chalky sensation you describe, and they add some extra viscosity as well. This is the reason that things like ice cream are so, well, creamy, why certain sauces can be finished (or "mounted") with butter to improve their texture, and so on.

I came across this article which experimented with a few different variables when making rice milk. (One interesting but semi-unrelated note is that toasting the rice before soaking may help add further flavor and reduce the "raw" character you describe.) However, this does note that rice milk made with oil has a tendency to separate, which could be a problem.

There might be additional ingredients you could add to further refine the texture and prevent the mixture from separating. Xanthan gum, for example, provides a slightly more viscous texture and is very effective at particle suspension, which would help keep the rice and fat emulsified. Guar gum may also have its advantages since you'll (presumably) be keeping your rice milk cold. These are the same sorts of stabilizers used in commercial ice creams to help keep a refined, smooth texture. I think adding a very small amount of these hypercolloids could be worth trying to further smooth out the texture of your rice milk while also preventing it from separating. Add carefully, though - too much and you'll wind up with rice gel. These ingredients are readily available here in the US at specialty-foods stores, co-ops, and health foods stores.

Ok this post is 3yrs old but i dont know if this will work with rice milk but worth a try. I usually do this with oat milk

Use cooked rice 1: 3 or 4 rice : water Blend on high for a few minutes, then strain through nut milk bag and let sit for 30 minutes or so. When the starch and all that "slime" seperates use a ladle and bottle for the top layer, trying not to disturb the bottom layer.