Originally Posted by Thighs Be Gone
I would PM Kaplods. She will know.
Unfortunately, I may not be much help. I love turnips, and find them sweet and a bit peppery, but not bitter. I even like them raw. Maybe you got some not-so-great turnips, or you may be more sensitive to bitter flavors (there've been studies that have shown that people are able to detect bitterness to differening degrees, "super-tasters," are much more bitter-sensitive).
I do find turnip greens bitter, but my remedy isn't very diet-friendly unless you're on Atkins or another low carb plan (bacon and onion).
A smidgen of fat and or sweetness, or a combination of both is my generic remedy for bitterness.
I've found that turnips do sweeten the longer they cook. So a low simmer in chicken broth may help (obviously this doesn't really help you if they're already mashed). Reheating may actually help some.