Çorbayı kepçeyle servis ederken üstündeki buhara dikkat et.

Because çorba is the direct object of servis etmek, and here it refers to a specific soup, so Turkish marks it with the accusative ending.

• çorba = soup
• çorbayı = the soup

The extra -y- is a buffer consonant. Turkish inserts it because çorba ends in a vowel and the accusative ending also begins with a vowel.

So:

• çorba servis etmek can sound more general
• çorbayı servis etmek = to serve the specific soup

Yes. Kepçeyle is a shortened form of kepçe ile, and both mean with a ladle.

Breakdown:

• kepçe = ladle
• ile = with
• kepçe ile → kepçeyle

When ile is attached to the end of a noun, it often becomes:

• -la / -le
• or after a vowel, -yla / -yle

So:

• araba ile → arabayla
• kepçe ile → kepçeyle

Both versions are correct, but the attached form is very common in everyday Turkish.

Servis ederken means while serving or when serving.

It comes from:

• servis etmek = to serve
• ederken = while doing

Since servis etmek is a compound verb, only etmek gets conjugated. So:

• servis etmek = to serve
• servis ederken = while serving

The noun servis stays the same, and the verb part changes.

This is just how etmek behaves in Turkish. In some forms, et- changes to ed- / eder-.

For example:

• etmek = to do
• eder = does / is doing in certain constructions
• ederken = while doing

So servis ederken is the normal and correct form.

This is similar to a few other common verbs that change shape in certain forms. It is something learners usually just memorize as a pattern.

Literally, üstündeki means something like the one that is on top of it or the one above it.

It breaks down like this:

• üst = top, upper side
• üstü = its top / its upper part
• üstünde = on it / above it
• üstündeki = the one that is on it / above it

In this sentence, üstündeki describes buhar:

• üstündeki buhar = the steam above it / the steam on top of it

So it works like a relative adjective.

It refers back to çorba.

So the idea is:

• çorbayı ... servis ederken = while serving the soup
• üstündeki buhar = the steam above the soup

Turkish often leaves this kind of reference implicit instead of repeating the noun. English might repeat it more clearly, but Turkish does not need to.

Because the expression dikkat etmek takes the dative case, not the accusative.

So the pattern is:

• bir şeye dikkat et = pay attention to something / be careful of something

That is why you get:

• buhar = steam
• buhara = to the steam

Examples:

• Yola dikkat et. = Watch the road.
• Köpeğe dikkat et. = Be careful of the dog.
• Buhara dikkat et. = Watch out for the steam.

This is a very common pattern in Turkish and worth memorizing as a set expression.

It can mean both, depending on context.

Literally, it is pay attention, but in warning situations it often translates more naturally as:

• be careful
• watch out
• take care

In this sentence, because the thing being mentioned is steam, the meaning is clearly a warning:

• Be careful of the steam
• Watch out for the steam

So even if the literal structure is pay attention to the steam, the natural English meaning is stronger than that.

Et is the singular imperative, used when speaking directly to one person.

So:

• dikkat et = be careful / pay attention

If you wanted a plural or more polite form, you could say:

• dikkat edin

So this sentence is addressed to one person in a direct, normal instruction style.

The sentence follows a very normal Turkish pattern:

• time/action clause first: Çorbayı kepçeyle servis ederken
• main warning after that: üstündeki buhara dikkat et

Turkish often puts the main verb at the end, so et comes last.

A more word-for-word structure would be something like:

• While serving the soup with a ladle, pay attention to the steam above it.

The order could be changed somewhat for emphasis, but this version sounds natural and clear.

It is a normal and common expression in modern Turkish.

• servis is a borrowed noun
• etmek is used to turn many borrowed nouns into verbs

This is a very common pattern in Turkish. For example:

• kontrol etmek = to check
• tamir etmek = to repair
• servis etmek = to serve

So even though part of it is borrowed, the whole expression is perfectly ordinary Turkish.