I have extra cream cheese frosting from a carrot cake I made last week. I want to make blueberry muffins. I’d like a recipe with oil so I can substitute applesauce.

I have extra cream cheese frosting from a carrot cake I made last week. I want to make blueberry muffins. I’d like a recipe with oil so I can substitute applesauce.
I have a blueberry muffin mix. What can I do to make it an extra yummaliscious treat?
I have to make lots of muffins for a construction crew for their breakfast, and I wanted to have some different options. So, if you know of any good blueberry muffin recipes, please share them. =)