These turned out great! If using thawed frozen berries, watch out for the juice! Checked right at 18 minutes and they were perfectly done. Next time might want to check a minute or two sooner. I like to fill the cups 1/2-3/4 of the way full so I got 16 muffins out of one batch. I think I like it better without the crumb topping but I'm probably in the minority. Would do the crumb topping if making them for others. Would not do the crumb topping if making them just for me.
I used salt, garlic powder, onion powder, and paprika. Each piece was well baked. Could have been crispier but I liked how it turned out! I would use this time and temperature for roasting diced sweet potatoes again.
Used Italian seasoning instead of thyme. For season salt used mostly cookies flavor enhancer and a bit of coarse sea salt. Sprinkled parsley flakes on top after it baked.