bittersweet

The dark green mooncake is loaded with matcha-infused salted egg yolk custard, which gives a bittersweet taste.

[…] sensations of this kind, however delicious, are, at their first recognition, of a very tumultuous nature, and have very little of the opiate in them. They were, moreover, in the present case, embittered with certain circumstances, which being mixed with sweeter ingredients, tended altogether to compose a draught that might be termed bitter-sweet […]