If you want a richer, nuttier flavour burn the butter. The advice for cupcake frosting works just as well for me: you have to burn it to intensify.
Intensification writing tips for cooking it up:
1 Strengthen nouns and verbs
2 Fewer words create impact
3 Break a sentence rule, periodically ;)
4 If the right word doesn’t exist, take a few ingredients from other words you may have lying around, and make one
He slithered the length of the bar. Spittled compliments on me.