First time ever having sweet potato fries!

My mother made some last night, for some reason she put butter on them, they were too mushy and sweet. I made some for lunch today. I cut them really thin, put some cooking spray on a pan, and salt,pepper, and garlic powder, I put them on the pan in one layer, and sprayed them with a little more cooking spray. Then I baked them. I'm not sure how long I baked them for and I adjusted the
temperature a few times. They turned out good, still a little mushier than I like, but I liked the taste and texture. It's just something I need to get used to.