Can these be prepared ahead of time and baked right before they're served?

I've made something similar to this recipe, and I did assemble them ahead of time. I probably refrigerated them, assembled, for about six hours before baking them, and they were perfect.

The recipe author might have missed this question -- you could try sending her a direct message by clicking the envelope button on her profile page here: https://food52.com/users/7575-helenthenanny