prefix
sweet and melt-in-the-mouth; sweet and smooth
Used as a prefix in food contexts to describe a sweet, rich, and tender texture that seems to melt in the mouth, often for fatty tuna, desserts, or creamy dishes.
この甘トロのマグロは絶品だ。
This sweet, melt-in-the-mouth tuna is exquisite.
甘トロ食感のプリンが人気です。
The pudding with a sweet, smooth texture is popular.
とろける is a verb meaning 'to melt' (intransitive), often used for food that melts in the mouth; 甘トロ is a prefix describing the resulting quality.
Compound of 甘 (sweet) and トロ (from とろり or とろける, referring to a melt-in-the-mouth texture). The exact derivation is uncertain, but it is a modern food-related coinage.