Eu gosto de pôr canela e baunilha na massa.

Because gostar normally takes the preposition de in Portuguese.

You say:

• gostar de + noun
• gostar de + infinitive

So:

• Gosto de canela
• Gosto de cozinhar
• Gosto de pôr canela na massa

So gosto de pôr is the normal structure, not gosto pôr.

After gostar de, if the next idea is an action, that action stays in the infinitive.

So the pattern is:

• Eu gosto de + infinitive

Examples:

• Gosto de ler
• Gosto de cozinhar
• Gosto de pôr canela na massa

This is similar to English I like to put or I like putting.

The accent is part of the correct spelling of the verb pôr.

It also helps distinguish it from por, which is a different word: a preposition meaning by, through, for, depending on context.

So:

• pôr = to put
• por = preposition

This is a very common thing learners notice, and yes, the accent is important.

In Portugal, pôr is very natural and common in everyday speech.

You could also say colocar, but that sounds a bit more neutral or slightly more formal in some contexts.

So all of these can work:

• Gosto de pôr canela e baunilha na massa
• Gosto de colocar canela e baunilha na massa

In European Portuguese, pôr is absolutely normal here.

Because when talking about ingredients in a general way, Portuguese often leaves out the article.

So it is very natural to say:

• pôr canela
• juntar açúcar
• usar farinha

If you said a canela e a baunilha, it could sound more specific, as if you were referring to particular ingredients already mentioned, or just slightly heavier stylistically.

In this sentence, no article is the most natural choice.

Na is a contraction of em + a.

• em
  • a = na

Because massa is feminine singular, a is the article used with it.

Other common contractions are:

• no = em + o
• nas = em + as
• nos = em + os

So na massa literally comes from em a massa, which becomes na massa.

In Portuguese, after verbs like pôr, the preposition em is often used where English might say in or into.

So Portuguese says:

• pôr na massa
• pôr no forno
• pôr no prato

Even if English prefers into in some cases, Portuguese normally uses em and its contractions such as na and no.

Massa can mean different things depending on context.

Common meanings include:

• dough
• batter
• mixture
• pasta
• mass

In this cooking sentence, it most likely means dough or batter, depending on what is being made.

So the exact English word depends on the recipe context.

No. Portuguese often leaves out subject pronouns because the verb ending already shows the person.

So both are correct:

• Eu gosto de pôr canela e baunilha na massa
• Gosto de pôr canela e baunilha na massa

Adding Eu can give a little emphasis, contrast, or clarity, but it is not required.

The difficult part for many English speakers is lh.

A useful approximation is the lli sound in million, although it is not exactly the same.

So baunilha is roughly like:

• ba-u-NEEL-ya

That is only an approximation, but it helps.

The key point is that lh is a single consonant sound in Portuguese, not a separate l plus h.

Yes, a little, but the original order is the most neutral and natural:

• Eu gosto de pôr canela e baunilha na massa.

Portuguese does allow some movement for emphasis, for example:

• Na massa, gosto de pôr canela e baunilha.

But in ordinary speech, the original version is the best default choice.