Чтобы сделать тесто, лучше просеять муку через сито.

Here чтобы means to / in order to and introduces a purpose clause.

So:

• Чтобы сделать тесто = To make the dough / In order to make the dough

A very common pattern is:

• Чтобы + infinitive = to do something, in order to do something

especially when the person doing both actions is the same.

For example:

• Чтобы понять это, нужно время. = To understand this, time is needed.
• Чтобы выучить русский, надо много читать. = To learn Russian, you need to read a lot.

Сделать is the perfective form, while делать is imperfective.

In this sentence, the perfective is used because the speaker is talking about achieving a complete result:

• сделать тесто = to make the dough as a finished result

Russian recipes and instructions often use perfective verbs when they focus on a completed action or result.

Compare:

• делать тесто = to be making dough / to make dough in a general or repeated sense
• сделать тесто = to make the dough successfully, to get it made

So here сделать fits the idea of a concrete cooking step with an outcome.

For the same aspect reason: просеять is perfective, and просеивать is imperfective.

• просеять муку = to sift the flour as a completed action
• просеивать муку = to be sifting flour, or to sift flour regularly / in general

In recipe-style language, Russian often prefers the perfective when giving advice about a step to complete:

• лучше просеять = it’s better to sift

That sounds like: do this step, and finish it.

Here лучше means it is better or better to.

This is a very common Russian structure:

• лучше + infinitive

So:

• лучше просеять муку = it’s better to sift the flour

Important: this лучше is not an adjective here. It is being used as a predicative word/adverb-like form meaning better in an impersonal statement.

Compare:

• Это лучше. = This is better.
• Лучше подождать. = It’s better to wait.

In your sentence, there is no explicit subject like you. Russian often leaves it unstated in general advice.

Russian very often uses impersonal or subjectless constructions for general advice, instructions, and recipes.

So instead of saying:

• You should sift the flour

Russian often says something more like:

• Лучше просеять муку. = It’s better to sift the flour.

This sounds natural and neutral. It is especially common in:

• recipes
• manuals
• advice
• general statements

If you wanted, you could make the subject explicit in other ways, but it would sound less neutral:

• Вам лучше просеять муку. = You’d better sift the flour.

That version addresses someone more directly.

Because мука is the direct object of просеять, so it must be in the accusative case.

Dictionary form:

• мука = flour

Accusative singular:

• муку

This is a feminine noun ending in -а, so in the accusative singular it changes to -у.

Compare:

• Я покупаю муку. = I am buying flour.
• Надо просеять муку. = It is necessary to sift the flour.

So in your sentence:

• просеять муку = to sift the flour

It actually is in the accusative case, but тесто is a neuter inanimate noun, and for this type of noun the nominative and accusative forms are identical.

So:

• nominative: тесто
• accusative: тесто

That is why it looks unchanged.

Compare with a feminine noun like мука:

• nominative: мука
• accusative: муку

But with тесто, the form stays the same.

Через means through, and it normally takes the accusative case.

So:

• через сито = through a sieve

The noun сито is neuter, and like тесто, its nominative and accusative singular forms are the same:

• nominative: сито
• accusative: сито

That is why you do not see a visible change.

Useful comparison:

• через дверь = through the door
• через окно = through the window
• через сито = through a sieve

Not here. Although через can mean different things depending on context, in this sentence it means through.

So:

• просеять муку через сито = to sift flour through a sieve

This is the normal expression in Russian.

Depending on context, через can also mean:

• through
• across
• via
• after (in time expressions)

But with a sieve, through is the correct meaning.

Because Чтобы сделать тесто is a subordinate clause introduced by чтобы, and in Russian such clauses are usually separated by a comma from the main clause.

Structure:

• Чтобы сделать тесто, | лучше просеять муку через сито.

So the comma marks the boundary between:

1. the purpose clause
2. the main statement

This is standard Russian punctuation.

Yes. Russian word order is flexible, and you could say:

• Лучше просеять муку через сито, чтобы сделать тесто.

That is grammatically possible. However, the original order:

• Чтобы сделать тесто, лучше просеять муку через сито.

puts the purpose first: to make the dough.

This sounds natural if the speaker wants to start with the goal and then give the advice.

Russian word order often changes the focus rather than the basic meaning.

It is understandable and grammatically correct, but depending on context, Russian may also use other verbs that are more specific.

Common options include:

• сделать тесто = make dough
• приготовить тесто = prepare dough
• замесить тесто = knead/mix dough

Замесить тесто is often especially natural when talking about actually mixing and kneading dough.

So your sentence is fine, but in cooking contexts a native speaker might also say something like:

• Чтобы приготовить тесто, лучше просеять муку через сито.
• Чтобы замесить тесто, лучше просеять муку через сито.

The best choice depends on exactly what stage of cooking you mean.

Yes, it is a very normal and common collocation.

• просеять муку = sift flour
• через сито = through a sieve

Together they form a natural cooking expression:

• просеять муку через сито

A learner should remember this as a useful chunk, because Russian often uses standard verb + object + prepositional phrase combinations like this in practical contexts.

Usually, yes. In a sentence like this, Чтобы + infinitive strongly suggests that the same person is responsible for both actions.

Here the implied logic is:

• the person who wants to make the dough
• is the same person who should sift the flour

If the subjects are different, Russian more often uses a full clause with a finite verb, for example:

• Чтобы тесто получилось хорошим, муку лучше просеять через сито. = For the dough to turn out well, it’s better to sift the flour through a sieve.

So Чтобы + infinitive is especially common when the subject is general or shared.

The sentence has two main parts:

1. Чтобы сделать тесто
   = purpose clause
   = To make the dough

2. лучше просеять муку через сито
   = main clause
   = it’s better to sift flour through a sieve

So the overall pattern is:

• To achieve X, it is better to do Y.

This is a very useful structure in Russian for giving advice or explaining methods.