Spent an embarrassing amount of last December hunting for these, because my usual dark romance picks felt weirdly off-season. The problem with a lot of 'holiday spice' is it leans too hard into the jolly, bearded cliché without any real emotional grounding. Like, if the North Pole setting feels more like a cheap costume than an actual backdrop for connection, I'm out.
What worked for me was 'The Christmas Hire' by J. S. Scott—not strictly Santa, but a grumpy, isolated guy playing the role for a town event. The romance builds because the heroine sees the man underneath the suit, his loneliness echoing the quiet of a snowed-in cabin. The festive stuff is just atmosphere, which is how it should be. Another one that nailed the tone was a short I found on Radish called 'Mistletoe & Melted Snow.' It's about a woman who accidentally knocks over the mall Santa, and the story is less about the costume and more about two people feeling disconnected from the holiday finding a raw, intimate escape together. The Christmas lights are just the lighting, not the point.
I've learned to avoid anything that describes the hero's 'bowl full of jelly' in a non-ironic way. The good ones use the holiday as a pressure cooker for intimacy, not as a kink accessory. They often have this warmth mixed with a kind of melancholy that really gets me—like finding something real in the middle of all the forced cheer.