I spied the recipe on Pinterest and it lead me to a really fun site - Fat Girl Trapped in a Skinny Body.
I followed the recipe exactly, except for spraying the muffin tin first. I should have, while they didn't stick for getting them out (thought mine didn't look quite as nice as they do on the Fat Girl site), they made a mess that was no fun to clean and I think if I had sprayed them first that would have been easier.
Everyone loved them, even the kids! Next time I make them we're thinking of putting onions in a few, would taste like a western! Really the additions are endless - maybe some ham, pepper, different cheeses, etc.