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Webster 1913 Edition

(tāst′ȧ-b’l)

Adj.

Capable of worthy of being tasted; savory; relishing.

Adj.

[from taste.] That may be tasted; savory; relishing.

tastable ‎(comparative more tastable, superlative most tastable)

2007, Günter Radden, René Dirven, Cognitive English grammar, page 284: "Conversion predicates of perception tend to be coded as adjectives: visible, audible, palpable and tangible, but English lacks adjectives such as *smellable and *tastable for something that can be smelled or tasted."