bland

a bland oil

The coffee was bland.

First and foremost, alternative country artists generally claim to reject mainstream country music as musically indistinguishable from bland pop music, as lyrically superficial, and as having no artistic merit […]

He's reading Balzac and knocking back Prozac / It's a helping hand that makes you feel wonderfully bland

Where didst thou find, young Bard, thy sounding lyre? / Where the bland accent, and the tender tone?