sourness

apples, tart (e.g., Granny Smith, Winesap)

blackberries

buttermilk

caraway seeds

cheese, sour (e.g., chèvre, other goat cheese)

cherries, sour

citrus

cloves

coriander

cornichons

cranberries

cream cheese

cream of tartar

crème fraîche

currants

fermented foods

fruits: sour, unripened

galangal

ginger

grapefruit

grapes, green

kaffir lime

kiwi fruit

kumquats

lemon, preserved

lemon: juice, zest

lemongrass

lime: juice, zest

milk, goat’s

miso

mushrooms, enoki

orange: juice, zest

pickled foods

plums, esp. unripe

ponzu

quince

rhubarb

rose hips

sauces, reduced-wine

sauerkraut

sorrel

sour cream

soy sauce

sumac

tamarind

tomatoes, esp. green

verjus

vinegars

whey

wine, dry

yogurt

yuzu