My husband adds an extra tablespoon of butter to the quantity called for in the recipe. One run through the microwave melted the butter for the recipe and prepped the pan for baking all at once. (If you use metal bread pans, you could easily melt your butter over a burner on your stove instead.) He swirls the butter around the pan before dumping it all out into the bowl with the other ingredients.
Forget butter wrappers or paper towels to grease your pan, just let the butter do its own dirty work!
Related: How To Make Basic Banana Bread
(Image: Sarah Rae Trover)