Best brownies substitutes

[saltychoc]

I love making brownies, mostly with pecans or walnuts but I want to step out of my comfort zone.
Are there any recipes which will give me the same gooey loveliness that brownies have?

Chocolate fondants

Either of these cookie recipes www.janespatisserie.com/2019/03/06/nutella-stuffed-cookies/
www.iheartkatiecakes.co.uk/2016/04/nutella-melting-middle-cookies.html

Or these flapjacks savvybites.co.uk/soft-and-chewy-chocolate-flapjacks/

I forgot to say preferably not chocolate based!

Then try this gingerbread www.bbc.co.uk/food/recipes/spiced_gingerbread_45369

Wow, thanks @Fivemoreminutes1 - just what I'm after!