Вдобавок к чизкейку мы заказали чай.

Вдобавок means in addition, on top of that, or besides that.

In this sentence, вдобавок к чизкейку means in addition to the cheesecake.

It introduces an extra thing that was ordered:

• cheesecake + tea

So the whole phrase sets up the idea of adding tea to something else.

Because the fixed expression is:

вдобавок к + dative case

So Russian says literally something like:

• in addition to X

Examples:

• вдобавок к ужину — in addition to dinner
• вдобавок к подарку — in addition to the gift
• вдобавок к чизкейку — in addition to the cheesecake

You should learn вдобавок к as a chunk.

Because к requires the dative case here.

The base form is:

• чизкейк — cheesecake

Its dative singular form is:

• чизкейку

So:

• вдобавок к чизкейку = in addition to the cheesecake

This is a normal masculine noun pattern:

• торт → к торту
• чай → к чаю
• чизкейк → к чизкейку

Чай is the direct object of заказали, so it is in the accusative case.

But for many inanimate masculine nouns, the accusative singular looks exactly like the nominative singular.

So:

• nominative: чай
• accusative: чай

That is why the form does not visibly change.

Compare:

• Мы заказали чай. — We ordered tea.
• Мы любим чай. — We like tea.

Заказали is perfective past tense, and it usually presents the action as completed.

Here, the sentence is about a finished event:

• we ordered tea

So заказали is the natural choice.

Compare:

• Мы заказали чай. — We ordered tea. / We placed the order.
• Мы заказывали чай. — We were ordering tea / We used to order tea / We ordered tea (with focus on the process or repeated action, depending on context)

In this sentence, the speaker is simply reporting what was ordered, so заказали fits best.

Because the subject is мы = we.

Russian past tense agrees in gender/number:

• я заказал / заказала
• ты заказал / заказала
• он заказал
• она заказала
• оно заказало
• мы заказали
• вы заказали
• они заказали

So мы заказали means we ordered.

Yes. Russian word order is flexible.

The sentence as given:

• Вдобавок к чизкейку мы заказали чай.

This puts focus first on the additional item relationship: tea was ordered in addition to the cheesecake.

Other possible versions:

• Мы заказали чай вдобавок к чизкейку.
• Чай мы заказали вдобавок к чизкейку.

These are all grammatical, but the emphasis changes.

Very roughly:

• Вдобавок к чизкейку... = setting the context first
• Мы заказали чай... = more neutral statement first
• Чай мы заказали... = emphasizes tea

Not exactly.

• вдобавок к = in addition to
• кроме can mean besides, apart from, or sometimes except for, depending on context

In this sentence, вдобавок к чизкейку clearly means that tea was added to the cheesecake order.

If you used кроме чизкейка, it could sound more like:

• besides the cheesecake or in some contexts even
• except for the cheesecake

So вдобавок к is more precise here when you want the idea of adding something extra.

Here it is written correctly as one word: вдобавок.

That is the normal spelling when it means in addition, besides, moreover.

So:

• вдобавок к чизкейку — correct

It is best to memorize it in this fixed expression:

• вдобавок к + dative

Yes. It is a borrowed word from English, but it is used in Russian as a normal noun.

Russian speakers commonly use:

• чизкейк

And it declines like a regular masculine noun:

• nominative: чизкейк
• genitive: чизкейка
• dative: чизкейку
• accusative: чизкейк
• instrumental: чизкейком
• prepositional: о чизкейке

So even though the word comes from English, its grammar in Russian is fully normal.

Because Russian does not have articles like a or the.

So Russian often leaves definiteness to context.

In this sentence:

• к чизкейку can mean to the cheesecake / to cheesecake
• чай can mean tea / some tea / the tea, depending on context

English needs articles, but Russian does not.

It is closer to We ordered tea in addition to the cheesecake than to We ordered tea with the cheesecake.

Вдобавок к emphasizes addition:

• first item: cheesecake
• extra item: tea

If you just want to say things were ordered together, Russian might use other wording depending on the situation. But вдобавок к specifically highlights that tea was an extra addition.

A practical pronunciation guide:

vdah-BAH-vak k cheez-KAY-koo my zah-kah-ZA-lee chay

A few notes:

• вдобавок has stress on ба: вдоба́вок
• чизкейку has stress on кей: чизке́йку
• заказали has stress on the last а: заказа́ли
• чай rhymes roughly with eye, but starts with ch

If you want, you can also think of the rhythm like this:

вдоба́вок к чизке́йку мы заказа́ли чай