noun
thick layer; laying on thickly
Refers to a thick application or generous serving, especially of food, paint, or other substances. Often used in cooking contexts.
このラーメンはチャーシューの厚盛りが人気だ。
This ramen is popular for its thick slices of chashu.
パンにバターを厚盛りに塗った。
I spread a thick layer of butter on the bread.
大盛り means a large portion or serving, while 厚盛り emphasizes thickness or a thick layer rather than overall quantity.
Compound of 厚 (thick) and 盛り (serving, piling up). The exact historical derivation is uncertain, but the word is transparently formed from these elements.