I have never heard of a library loaning out baking items! That's very cool.
If you get 24 brownie bites, that would be two per person. I can tell you that around here, most people will only take one or two pieces of anything, and then they're done. Then again, I've made orange-pineapple muffins in mini-muffin pans and brought in a dozen for the five of us in my department at work and then were gone in no time. If you do decide to double the batch, you can always take leftovers (if there are any!) home for the freezer.
If you get 24 brownie bites, that would be two per person. I can tell you that around here, most people will only take one or two pieces of anything, and then they're done. Then again, I've made orange-pineapple muffins in mini-muffin pans and brought in a dozen for the five of us in my department at work and then were gone in no time. If you do decide to double the batch, you can always take leftovers (if there are any!) home for the freezer.