I really like the Smitten Kitchen website. I have been following it for years, and have made numerous wonderful recipes.
One of my favorite brownie recipes is:
http://smittenkitchen.com/blog/2012/08/my-favorite-brownies/
I recently made this tart, and I made it again.
http://smittenkitchen.com/blog/2016/03/chocolate-peanut-butter-tart/
Both are big hits.
I have also made this:
http://smittenkitchen.com/blog/2013/11/cauliflower-with-brown-butter-crumbs/
and this:
http://smittenkitchen.com/blog/2009/11/salted-brown-butter-crispy-treats/