Spicy salt is a thing.

Spicy salt

You can get chicken salt. Why not spicy salt?

My exact response.

Duo is obviously just white

The dictionary form is "맵다." This is called a "ㅂ irregular" in which the ㅂ gets replaced by 우 when a vowel is added to the stem (맵). So you start with 맵다 from which you get the stem "맵." You conjugate it to "맵은" like you said, but since a vowel is added it changes to "매운."

The basic form of "to be spicy" in Korean is 맵다. This makes it a ㅂ irregular which is conjugated as such : 매워요, 매운... A good example is 새롭다 which becomes 새로워요, 새로운... Go to dongsa.net for conuugations.

The base form is 맵다, which is irregular, and ㅂ changes to 우 when conjugated.

맵다 is irregular, and ㅂ changes to 우 when conjugated.

All the above responses + You add ㄴ at the end of a verb stem if it ends in a vowel, and 은 if it ends in a consonant. Therefore, 매우 + ㄴ = 매운 (spicy). 작 (verb stem meaning "short") end in a consonant, so 작 + 은 = 작은 (short)

Hope this helps (: