It is still considered Butterbrot or boterham even if additional toppings, such as cheese, spreads, or lunch meats, are added, as long as it begins with a slice of bread with butter.
In modern Russian the term has a more general meaning, whatever the ingredient on top of the slice of bread is
“No! It’s a sandwich! How could you forget about butterbrot???”
“It’s a friggin’ slice of toast. That’s not a sandwich!”
A third redditor comes in. “Oh, my god! Not again!” They are about to leave but then they notice something brand-new. “Is that a hippopotamus-shaped cutting board?”
Cw:meat
I’m imagining redditors at breakfast.
“It’s a sandwich.”
“It’s a slice of toast. That’s not a sandwich!”
“No! It’s a sandwich! How could you forget about butterbrot???”
“It’s a friggin’ slice of toast. That’s not a sandwich!”
A third redditor comes in. “Oh, my god! Not again!” They are about to leave but then they notice something brand-new. “Is that a hippopotamus-shaped cutting board?”