I found this recipe online:
http://www.averagebetty.com/recipes/...butter-recipe/
I'm not sure if using olive oil instead of canola oil would make a difference.
I buy whipped butter and leave it out. Refrigerating it makes it too difficult to spread. This recipe sounds a lot like whipped butter, so I'm wondering if it's supposed to be left outside the frig.
Edit: I see the last post on that website mentions using olive oil and that the refrigerated result was too hard. They didn't post back, though, how it worked with canola oil.