A Sunday Afternoon Mystery

I made "pizza buns" today.

I left the kitchen for a few minutes during the second rise, and came back to this:

Mike is convinced that I did not space the buns evenly on the cookie sheets. I am convinced that we have one (if not two) thieving cat(s).

I searched the house for a half-eaten bun, but had no luck finding it.

I suppose this mystery will never be solved. But I'm pretty sure Mac looks guilty...