Okrenuću pljeskavice hvataljkama.

Because this is a standard way of forming the future tense in Serbian.

The verb is okrenuti = to turn / to flip.
The future auxiliary is ću = I will.

When ću comes after the infinitive, Serbian normally:

• drops the infinitive ending -ti
• and attaches the auxiliary to the verb

So:

• okrenuti + ću → okrenuću

A separate version is also possible:

• Ja ću okrenuti pljeskavice hvataljkama.

But you normally do not start a sentence with bare ću, because it is a clitic and usually cannot stand first by itself.

Because Serbian often leaves out subject pronouns when the verb ending already shows who the subject is.

In okrenuću, the ending already tells you it means I will flip. So ja is unnecessary unless you want emphasis or contrast.

For example:

• Okrenuću pljeskavice hvataljkama. = neutral
• Ja ću okrenuti pljeskavice hvataljkama. = I will flip the patties, maybe not someone else

This is very normal in Serbian.

Here pljeskavice is in the accusative plural, because it is the direct object of the verb okrenuću.

You are flipping the patties, so pljeskavice is the thing being acted on.

The noun is:

• singular nominative: pljeskavica
• singular accusative: pljeskavicu
• plural nominative: pljeskavice
• plural accusative: pljeskavice

So in this sentence, the form happens to look the same as the nominative plural, but its function is accusative plural.

Hvataljkama is in the instrumental case, specifically instrumental plural.

Serbian uses the instrumental case to show the tool or means used to do something.

So:

• hvataljkama = with tongs / using tongs

This is the same idea as in other Serbian sentences like:

• Pišem olovkom. = I am writing with a pencil
• Sečem nožem. = I am cutting with a knife

So Okrenuću pljeskavice hvataljkama literally means something like I will flip the patties using tongs.

Because Serbian often uses the instrumental case without a preposition when it means by means of / using a tool.

So:

• hvataljkama = with tongs
• not necessarily sa hvataljkama

This bare instrumental is the normal pattern for instruments and tools.

Using sa can sometimes sound more like together with or just put extra focus on the object, but for ordinary tool use, the preposition is usually unnecessary.

So Okrenuću pljeskavice hvataljkama is the natural way to say it.

It is plural instrumental.

The basic form is:

• hvataljke = tongs

Then:

• nominative plural: hvataljke
• instrumental plural: hvataljkama

This makes sense to English speakers, because tongs in English is also usually treated as a plural form.

Depending on context, Serbian can also have hvataljka as a singular noun for a gripping device, clip, clamp, etc., but for kitchen tongs, the plural hvataljke is very natural.

Okrenuti is a perfective verb.

That means it presents the action as:

• complete
• whole
• finished as a single event

So okrenuću suggests I will flip them over as a completed action.

If you used an imperfective verb such as okretati, the meaning would shift toward:

• repeated turning
• ongoing turning
• a process rather than one completed flip

So perfective okrenuti is exactly what you would expect for a one-time cooking action like flipping patties.

Yes. Serbian word order is more flexible than English word order.

This sentence can be rearranged depending on what you want to emphasize. For example:

• Okrenuću pljeskavice hvataljkama.
• Pljeskavice ću okrenuti hvataljkama.
• Hvataljkama ću okrenuti pljeskavice.

All of these are possible, but the emphasis changes a little:

• first version: neutral
• pljeskavice first: emphasis on what will be flipped
• hvataljkama first: emphasis on what tool will be used

One thing to remember is that if you use the separate auxiliary ću, it normally appears in the usual clitic position, not just anywhere.

Yes. That is also a very common Serbian way to express the future, especially in everyday speech.

So these are all natural ways to say roughly the same thing:

• Okrenuću pljeskavice hvataljkama.
• Ja ću okrenuti pljeskavice hvataljkama.
• Ja ću da okrenem pljeskavice hvataljkama.

The differences are mostly about style, structure, and emphasis, not basic meaning.

Your original sentence is concise and perfectly natural.