Peynirli böreği görünce bir tane almadan edemiyorum.

Because böreği has the accusative ending.

• börek = börek / a savory pastry
• böreği = the börek as a specific direct object

In this sentence, the speaker is talking about seeing a particular börek, so Turkish marks it as a definite object.

Also note the spelling change:

• börek
  • -i → böreği

The final k often becomes ğ when a vowel-initial suffix is added.

Peynirli means with cheese or cheese-filled / cheese-containing.

It comes from:

• peynir = cheese
• -li = a suffix meaning with / having

So:

• peynirli börek = cheese börek / börek with cheese

This -li suffix is very common in Turkish:

• sütlü kahve = coffee with milk
• şekerli çay = tea with sugar
• etli pide = meat pide

Görünce means when (I) see or upon seeing.

It comes from:

• görmek = to see
• verb stem: gör-
• -ünce / -ınca / -ince / -unca = when / once / upon doing

So:

• gör-
  • -ünce → görünce = when seeing / when I see

In this sentence, the subject is understood from the rest of the sentence, so görünce is naturally interpreted as when I see it.

Examples:

• Seni görünce mutlu oluyorum. = When I see you, I become happy.
• Eve gelince ararım. = I’ll call when I get home.

Because this form usually does not explicitly mark the subject. The subject is understood from context.

In Peynirli böreği görünce bir tane almadan edemiyorum, the main verb is:

• edemiyorum = I can’t do / I can’t help

That tells us the subject is I, so görünce is understood as:

• when I see the cheese börek

This is very normal in Turkish. Non-finite forms like -ince clauses often rely on the main clause to show the subject.

Bir tane means one or one piece / one item.

• bir = one / a
• tane = a counting word, like piece / unit / one item

So bir tane sounds a little more concrete than just bir. Here it means:

• one of them
• one piece
• one pastry

You could think of it as emphasizing the unit:

• bir börek = a börek
• bir tane börek = one börek / one piece of börek

In everyday Turkish, bir tane is extremely common when talking about buying, eating, or counting individual things.

Literally, it is something like:

• I cannot do without buying (one)

But the natural meaning is:

• I can’t help buying one
• I just have to buy one

It is built from:

• almak = to buy / take
• almadan = without buying
• edemiyorum = I can’t do

Together, -madan edememek is a common Turkish pattern meaning:

• to be unable not to do something
• to be unable to help doing something

So:

• gülmeden edememek = can’t help laughing
• bakmadan edememek = can’t help looking
• almadan edememek = can’t help buying

This is one of those patterns that feels backward at first to English speakers.

The structure is:

• verb + -madan / -meden = without doing
• edememek = not be able to do

So the literal logic is:

• I am not able to manage without buying one

That becomes:

• I can’t help buying one

So yes, there is a negative element, but the whole expression gives the idea of irresistibility, not simple negation.

This is similar to English expressions like:

• I can’t help laughing
• I can’t stop myself from buying one

Because -madan edememek is a fixed and very common expression in Turkish.

Even though etmek often means to do, in this pattern it is part of an idiomatic construction:

• ...madan edememek = can’t help doing ...

So Turkish speakers naturally say things like:

• Sormadan edemeyeceğim. = I won’t be able to resist asking.
• Gülmeden edemiyorum. = I can’t help laughing.

Using yapamıyorum here would not sound like the normal idiom.

Yes. Almak has a broad meaning range, including:

• to take
• to get
• to receive
• to buy

In food/shop contexts, it very often means to buy.

So here:

• bir tane almak = to buy one

This is very common in Turkish:

• Ekmek aldım. = I bought bread.
• Bir kahve alayım. = I’ll get/have a coffee.

The sentence is:

• Peynirli böreği görünce bir tane almadan edemiyorum.

A natural breakdown is:

• Peynirli böreği = the cheese börek
• görünce = when I see it
• bir tane = one
• almadan edemiyorum = I can’t help buying

Turkish word order is flexible, but this order is natural because it presents the situation in a smooth sequence:

1. the thing seen
2. the moment of seeing
3. the thing the speaker ends up doing
4. the main verb at the end

The main verb often comes last in Turkish, so edemiyorum at the end is very typical.

Yes, that is a very good natural translation.

Even though görünce literally means when I see, in context it often has a habitual sense:

• when(ever) I see

So this sentence can describe a repeated personal habit:

• Whenever I see cheese börek, I can’t help buying one.

That may sound more natural in English than a one-time reading, depending on context.

The object is understood from context.

• First, the sentence mentions peynirli böreği
• Then it says bir tane almak = to buy one

That one clearly refers back to the börek. Turkish often avoids repeating a noun when it is already obvious.

So instead of saying something longer like:

• bir tane peynirli börek almadan edemiyorum

the sentence simply says:

• bir tane almadan edemiyorum

This sounds natural and efficient.

Yes, very often. The pattern is:

• verb stem + -madan/-meden edememek
• meaning: can’t help doing

Examples:

• Gülmeden edemiyorum. = I can’t help laughing.
• Bakmadan edemiyorum. = I can’t help looking.
• Sormadan edemem. = I can’t help asking.
• Yemeden edemiyor. = He/She can’t help eating it.

It is a very useful pattern to learn because it sounds natural and expressive in everyday Turkish.