Can this be made and stored? Refrigerated or in cabinet?

I've made it and stored it in the refrigerator where it keeps for quite a while-- I can't tell you how long because I use it up pretty quickly.

Great question—I didn't think about it before because as written this makes so little you likely wouldn't have any left to store. But if you were doubling or tripling the batch, storing leftovers tightly sealed at room temperature should be just fine.