pålägg

Etymology
Nominalization of.

Noun

 * 1) (cold) food put on a sandwich; topping, filling, spread, cold cuts, etc.
 * 2)  extra fee (on a price, etc.)
 * 1)  extra fee (on a price, etc.)

Usage notes
Sandwiches are almost always buttered in Swedish cuisine, with the butter not normally considered a pålägg in itself.