Hon köper inte sådana kakor längre, eftersom barnen hellre vill ha frukt.

Because Swedish main clauses usually follow the V2 rule: the finite verb comes in the second position.

So in Hon köper inte sådana kakor längre:

• Hon = first position
• köper = finite verb, second position
• inte = comes after the finite verb

This is very common in Swedish:

• Hon äter inte kött.
• Jag förstår inte.

English often puts not with an auxiliary verb, but Swedish usually places inte after the finite verb in main clauses.

Sådan / sådant / sådana means such or that kind of.

It changes form to match the noun:

• sådan
  • common gender singular noun
• sådant
  • neuter singular noun
• sådana
  • plural noun

Since kakor is plural, Swedish uses sådana:

• en kaka = a cookie/cake
• kakor = cookies/cakes
• therefore: sådana kakor = such cookies / cookies like that

Examples:

• en sådan bok = such a book
• ett sådant hus = such a house
• sådana barn = such children

Sådana is the full standard written form.
Såna is a very common spoken and informal written version.

So:

• sådana kakor = standard, careful Swedish
• såna kakor = informal, everyday Swedish

Both are natural, but in textbooks and more formal writing you will usually see sådana.

Because the sentence is talking about that kind of cookies in general, not a specific known set of cookies.

• kakor = cookies, some cookies, cookies in general
• kakorna = the cookies, specific cookies

So:

• Hon köper inte sådana kakor längre = She doesn’t buy such cookies anymore
• Hon köper inte de där kakorna längre = She doesn’t buy those cookies anymore

Using sådana already gives the sense of that type of, so the indefinite plural kakor fits well.

Inte längre means no longer / not anymore.

So:

• Hon köper inte sådana kakor längre = She no longer buys such cookies / She doesn’t buy such cookies anymore

This is a very common Swedish pattern:

• Jag bor inte där längre. = I don’t live there anymore.
• Han jobbar inte här längre. = He no longer works here.

A learner should remember inte längre as a set expression.

Yes. Längre can mean longer, but the meaning depends on context.

Compare:

• ett längre möte = a longer meeting
• inte längre = no longer / not anymore

In your sentence, because it appears with inte, the meaning is clearly no longer.

Eftersom means because / since and introduces a subordinate clause.

Main clause:

• Hon köper inte sådana kakor längre

Subordinate clause:

• eftersom barnen hellre vill ha frukt

In a Swedish subordinate clause, word order is different from a main clause. The subject usually comes before the adverb:

• main clause: Hon köper inte ...
• subordinate clause: ... eftersom barnen hellre vill ha frukt

A famous rule learners often use is:

• in main clauses: verb before sentence adverbs
• in subordinate clauses: sentence adverbs before the finite verb

Here hellre is not exactly the same as inte, but the clause still shows typical subordinate-clause structure.

Barnen means the children.

• ett barn = a child
• barn = children
• barnen = the children

Swedish often uses the definite form when referring to a known group in the situation or context. So the sentence is not talking about children in general, but about the children relevant here—probably her children, the children in the family, or some specific children already known from context.

If it were general, you might expect barn instead.

Hellre means rather or preferably. It is used when one option is preferred over another.

So:

• barnen hellre vill ha frukt = the children would rather have fruit / prefer fruit

This is different from mer, which usually means more.

Compare:

• Jag vill hellre ha te än kaffe. = I’d rather have tea than coffee.
• Jag vill ha mer te. = I want more tea.

A good way to remember it:

• hellre = preference
• mer = quantity/degree

Because vilja often needs another verb or expression to complete the meaning.

• vill ha = want to have / want
• vill äta = want to eat
• vill gå = want to go

In Swedish, Jag vill kaffe is not correct. You say:

• Jag vill ha kaffe. = I want coffee.

So in your sentence:

• barnen hellre vill ha frukt = the children would rather have fruit

This is one of the most common verb combinations in Swedish.

Here frukt is being used as an uncountable/general noun, like fruit in English.

So:

• frukt = fruit, fruit in general
• frukter = fruits, individual kinds or pieces, less natural in many everyday contexts

In this sentence, the meaning is simply that the children prefer fruit as food, so frukt is the natural choice.

Compare:

• Barnen vill ha frukt. = The children want fruit.
• Butiken säljer exotiska frukter. = The shop sells exotic fruits.

It has two parts:

1. Main clause
   Hon köper inte sådana kakor längre
   = She no longer buys such cookies

2. Subordinate clause introduced by eftersom
   eftersom barnen hellre vill ha frukt
   = because the children would rather have fruit

So the full structure is:

• Hon = subject
• köper = finite verb
• inte = negation
• sådana kakor = object
• längre = time adverbial
• eftersom ... = reason clause

This is a very typical Swedish sentence pattern: a main statement followed by a reason.

Sometimes yes, but not always in exactly the same way.

• eftersom = because / since
• för att can also mean because, but it is also used for in order to, so it can sometimes be less clear

In this sentence, eftersom is a very natural choice because it clearly introduces a reason:

• Hon köper inte sådana kakor längre, eftersom barnen hellre vill ha frukt.

You may also hear:

• ... för att barnen hellre vill ha frukt.

That can work in speech, but eftersom is often the cleaner, more unambiguously causal option.

In natural speech, the stress often falls on the words carrying the key information, especially:

• inte
• sådana kakor
• längre
• hellre
• frukt

A natural rhythm might emphasize the contrast:

Hon köper inte sådana kakor längre, eftersom barnen hellre vill ha frukt.

The important contrast is:

• not those cookies anymore
• rather fruit

That helps show the reason for the change.