Learn Portuguese (Portugal): O lanche é um bolo.

No! The word é (is) comes from the verb ser (to be). Even though ser ends in "-er", it is an irregular verb, meaning it completely breaks the normal conjugation rules you are currently learning. Because it is used so often, you just have to memorize its unique forms.

Why do we use é here instead of está? Both mean "is", right?

Yes, but we use é (from the verb ser) to talk about facts, definitions, or permanent characteristics. Stating that the snack is a cake is a definition of what it is. You would use está (from estar) for temporary states, like saying the cake is currently warm (o bolo está quente).

What exactly counts as a lanche in Portugal?

While it roughly translates as "snack", a lanche specifically refers to a late-afternoon mini-meal eaten between lunch and dinner. It is a very common daily routine in Portugal and often includes coffee, tea, toast, sandwiches, or sweet treats like a bolo (cake or pastry).

How should I pronounce the ends of the words lanche and bolo?