Prendo un pasticcino al limone e gliene porto uno anche a Maria.

Because Italian usually drops subject pronouns when they are not needed. The verb endings already show who is doing the action:

• prendo = I take / I’m taking
• porto = I bring / I’m bringing

So io would normally be unnecessary here. You would add io only for emphasis or contrast, for example:

• Io prendo un pasticcino, tu no.
  I am taking a pastry, you aren’t.

In Italian, the present tense is often used for actions happening right now or in the immediate future.

So this sentence can sound like:

• I’m taking a lemon pastry and I’m bringing one to Maria too
• or I’ll take a lemon pastry and bring one to Maria too

This is very natural in everyday Italian, especially when someone is deciding what to do on the spot.

Pasticcino usually means a small pastry, little cake, or sweet pastry item.

The ending -ino often gives a diminutive sense, so it can suggest something small or sometimes just sound a bit more natural and specific than a more generic word like dolce.

So un pasticcino al limone is something like:

• a little lemon pastry
• a lemon sweet
• a lemon-flavored pastry

The exact English word depends on context.

Al limone is a very common way to describe a flavor in Italian.

• a + il = al
• al limone = lemon-flavored / with lemon

This structure is very common with food:

• gelato al cioccolato = chocolate ice cream
• torta al limone = lemon cake
• caramelle alla menta = mint candies

Sometimes di limone is possible in other contexts, but for flavors, al limone is often the most natural choice.

Because they are doing two different jobs.

• un in un pasticcino is the indefinite article: a
• uno later is a pronoun/number meaning one

So:

• un pasticcino = a pastry
• porto uno = I bring one

This uno is not an article before a noun; it stands alone and replaces the noun.

A useful comparison:

• Prendo un libro. = I take a book.
• Ne prendo uno. = I take one.

Here ne is a partitive pronoun. It means something like:

• of them
• of those
• some of that kind

In this sentence, ne refers back to the kind of thing already mentioned: pasticcini al limone.

So:

• ne porto uno literally = I bring one of them
• natural English = I bring one

English often does not translate ne directly, but Italian usually needs it in this kind of structure.

A very common pattern is:

• Ne prendo uno. = I’ll take one.
• Ne voglio due. = I want two.
• Ne abbiamo tanti. = We have many of them.

No. They do different things:

• ne tells you there is a set or category being referred to: of them / of those
• uno tells you the quantity: one

So ne porto uno means:

• I bring one of them

This is a very common Italian structure. Think of it like:

• ne = from that group
• uno = quantity = one

For example:

• Hai dei biscotti? Ne prendo due.
  Do you have any biscuits? I’ll take two.

Gliene is a combination of pronouns:

• gli / le = to him / to her
• ne = of them / of it / some

When Italian combines certain pronouns, gli or le becomes glie-, and then another pronoun is added.

So:

• gliene porto uno = I bring one of them to him/her

In this sentence, since the person is Maria, gliene means:

• to her, of them

So the full idea is:

• I bring one of those to her

Because in standard Italian, when le or gli combines with another pronoun like ne, the form becomes glie- + pronoun.

So you get:

• glielo
• gliela
• glieli
• gliele
• gliene

That means:

• le ne is not the normal standard form
• gliene is the correct combined form

Even though Maria is feminine, the correct combined pronoun is still gliene.

This is very common in Italian. The pronoun and the full noun can appear together for:

• clarity
• emphasis
• natural spoken style

So:

• gliene porto uno already means I bring her one
• gliene porto uno anche a Maria makes it explicit that the person is Maria

This is often called clitic doubling. It is especially common in spoken Italian.

It can feel repetitive to an English speaker, but in Italian it is normal.

Because here anche is focusing on Maria.

• anche a Maria = to Maria too / to Maria as well

This means Maria is being added to the list of people receiving one.

Compare:

• porto anche un pasticcino a Maria
  = I also bring a pastry to Maria
  (focus more on the action or item)

• porto un pasticcino anche a Maria
  = I bring a pastry to Maria too
  (focus more on Maria being included)

So the position of anche can slightly change what is being emphasized.

Because unstressed object pronouns in Italian normally go before a conjugated verb.

So you say:

• gliene porto uno
• lo vedo
• le parlo
• ne voglio due

Not:

• porto gliene uno
• vedo lo
• parlo le

Italian clitic pronouns usually come before the verb, except in some other structures, such as with infinitives or positive imperatives:

• portargliene uno = to bring her one
• portagliene uno! = bring her one!

Because lo would mean it, referring to a specific single pastry. That would suggest you are taking one pastry and bringing that same pastry to Maria.

But this sentence means something different: you take one lemon pastry for yourself, and you bring another one of the same kind to Maria too.

That is why Italian uses the partitive structure:

• ne porto uno = I bring one of them / one of that kind

So ne... uno is the right choice when you mean another one from that group, not that exact one.