red velvet muffins

They make a pretty decent red velvet muffin at the Jewel, so I went online to see what recipes were out there to try to replicate it.
Erin at Dinners Dishes and Desserts had a recipe I thought I'd give a go.

http://dinnersdishesanddesserts.com/?p=1225

They turned out pretty good. I don't use liners because I like a bit of crust on muffins.

I followed Erin's recipe with these alterations:
I used cider vinegar because that is what I had in the house
I replaced the red food coloring with vanilla because I am too much of a '70s child to trust red food coloring. Any others of you missing the tan M&Ms and still leery of the red ones?