but ‧ ter ‧ scotch /ˈbʌtəskɒtʃ $ -ərskɑːtʃ/ BrE AmE noun [uncountable]
[ Date: 1800-1900 ; Origin: Probably from butter + Scotch ; perhaps because it was first made in Scotland ]
a type of sweet or sauce made from butter and sugar boiled together, or the taste this has:
butterscotch pudding