Scabs.

“I put the Weetabix in the blood. It gives it texture.”

— Spike

Bones

Go after. A stroke victim with blood clots for that bobba tea experience.

Easy. Frozen blood.

Haven't you watched the Blade movies? At least in part 2 there is blood cocaine and blood... pudding? Something the Overlord eats.

diabetic blood

Scabs.

Bite a really skinny person. It'll crunch.

I imagine vampires can't just eat blood fried potatoes, but also they don't just eat human. Maybe Cicadas and Blood. Blood and Fingernails, with the dry leavings of a Leviathan's self measuring event. Tears can substitute only if shed without sincerity

The lore is usually that it tastes different based on what the human ate. Or whatever emotions the human is feeling.

There's probably some interesting digestive side effects to a body used to a liquid diet.

Can imagine a plotline where the vampire is always disappearing after human-style "masking" meals to sit around with stomach cramps and the runs.

Allow me to introduce you to Spain's morcilla. If you want it crunchy, I guess you can deepfry it.