I made shortbread with coconut flour and butter and xylitol - tastes pretty similar to normal shortbread and was really easy. Obviously a bit coconutty :)
Melt some butter with a tea spoon (or 2) of xylitol (vanila essence may work even better) and mix it with enough flour (coconut/almond) so it's moist but not soaked, chuck in a mold and bake till golden.
Have to say it did feel like i had a bit trouble digesting it, but i was transitioning to Keto so could be that. Or it could be i'm actually more sensitive to coconut than i thought.
Either way, was a super nice treat and very moreish. Most importantly it was sooooooooo easy. I made it again with a few crushed walnuts (which taste great when baked), and i've been thinking about making it with a few chips of dark chocolate, as a super treat ;D But then coconut flour is expensive so i may have to fall back on almond flour.
One thing i've thought about: There's this internet paleo chef 'the paleo mom' who essentially makes nothing but cake. And i think this mentality is kinda missing the point, ie. still driven by food. As the odd treat, i think this shortbread is ok, but i see some ingenious things going on with the fat bombs, and those would be much more nutritionally dense than short bread, which is essentially treats for the tastebuds. Even if it is drenched in butter.