Banana Walnut Muffins

Okay, so the name may be a little misleading, but essentially these are muffins that have bananas and walnuts in them... and not much else!  These are very easy.  Almost all the sweetness comes from the bananas!  These are a little dense, but very healthy... and nice and quick for a grab-and-go snack.

(Disclaimer:  I've only made these once, so I may experiment a little more, but Storm loved them, so they probably wouldn't change much)

2 bananas, mashed or pureed
2 eggs
1 1/2 cups walnuts, crushed (best if blended to where the oils are starting to be released)
1 tsp vanilla
1/2 tsp cinnamon

Place into greased muffin tin and bake at 350 degrees for 15-20 minutes.