Olive oil is excellent! In a test I saw on skunkpharm research, olive oil was second only to coconut oil in extraction of cannabinoids. I use it to make my cooking oil with as its better for cooking than coconut oil. For all else though, including baking, coconut oil is king!
I make my edibles w/ unrefined coconut oil mostly because of the reading I've done, it seems to extract the most from the cannabis, but I also add the Soy Lecithin while I'm decarbing it, so it helps catalyze the extraction.. Hands-down, best method I've tried over the years.. I also like the added taste of the coconut because it's definitely one of my favorites, but you can use refined which is usually scent/tasteless..
Next up, I'm going to do an infused cooking oil.. Not sure which one, as I've heard olive oil isn't the best, so I may use vegetable or canola.. I liked making canna butter, but I feel like it wasn't as strong.. Just ate a brownie, so I'll let you guys know how they worked in about an hour!!