Mi prima sabe batir la salsa hasta que queda más cremosa que antes.

Here, sabe + infinitive means knows how to do something.

So Mi prima sabe batir la salsa means that your cousin has the know-how or skill to whisk/beat the sauce properly.

This is different from:

• conoce = knows a person, place, or thing
• puede = can, is able to, is allowed to

So:

• Mi prima sabe batir la salsa = she knows how to do it
• Mi prima puede batir la salsa = she can do it, maybe because she is able to or has the opportunity

Batir is a common cooking verb meaning to beat, to whisk, or sometimes to stir vigorously, depending on context.

With la salsa, it suggests working the sauce energetically so its texture changes, usually becoming smoother, more blended, or more airy.

In English, the best translation depends on the recipe:

• to beat
• to whisk
• sometimes to mix well

In Spain Spanish, batir is a very normal verb in kitchen language.

In Spanish, the definite article is often used more than in English.

So batir la salsa is the natural way to say beat the sauce. Even when English might sometimes drop the article, Spanish often keeps it.

This is especially common with food, body parts, and things that are understood from context.

The personal a is normally used before a specific person or sometimes a personified animal.

Since la salsa is a thing, not a person, there is no personal a.

So:

• Veo a mi prima = I see my cousin
• Bato la salsa = I beat the sauce

Hasta que means until.

It is followed by a conjugated verb when what comes after it has its own subject or action.

Here:

• batir la salsa = the action your cousin does
• queda más cremosa = what the sauce does as a result

So the structure is:

• hasta que queda más cremosa = until it becomes / ends up creamier

If Spanish uses hasta followed directly by a verb, that verb usually has to be in the infinitive only in certain structures, such as:

• hasta lograr una buena textura = until achieving a good texture

But in your sentence, there is a separate clause, so hasta que + verb is correct.

Quedar has several meanings, and one very common one is to end up, to turn out, or to become in the end/result.

In cooking, this is very natural:

• La salsa queda cremosa = the sauce turns out creamy / ends up creamy
• El pastel quedó seco = the cake turned out dry

So in this sentence, queda más cremosa means the sauce reaches a creamier final state.

This is not exactly the same as:

• se pone más cremosa = it gets creamier
• está más cremosa = it is creamier

Queda focuses strongly on the resulting texture.

Because cremosa agrees with la salsa, which is:

• feminine
• singular

Spanish adjectives usually match the noun they describe.

So:

• la salsa cremosa
• el puré cremoso
• las salsas cremosas

That is why the sentence says más cremosa.

This is a comparative structure:

• más + adjective + que = more + adjective + than

So:

• más cremosa que antes = creamier than before

Here:

• más = more
• cremosa = creamy
• que = than
• antes = before

It compares the sauce’s current/resulting texture with how it was earlier.

Because after a comparative like más, Spanish normally uses que.

So:

• más cremosa que antes
• más grande que yo pensaba
• mejor que ayer

Antes is an adverb here, meaning before / earlier, so que antes means than before.

Because antes here is functioning as an adverb, not a noun.

It simply means before or earlier.

So:

• más cremosa que antes = creamier than before

If it were being used in another kind of structure, you might see other words around it, but in this sentence antes by itself is completely natural.

Yes, both can exist, but they mean slightly different things depending on context.

Here, queda is in the indicative because the sentence describes a real, general result:

• your cousin knows how to beat the sauce until it gets creamier

It presents the result as something expected or factual.

You might see hasta que quede in contexts involving intention, command, or something not yet realized, for example:

• Bate la salsa hasta que quede cremosa. = Beat the sauce until it becomes creamy.

So, very roughly:

• queda = stated as a usual/factual result
• quede = often after instructions, commands, or future/expected result

No. The subject of queda is la salsa.

That is an important point in the sentence:

• Mi prima sabe batir la salsa = your cousin performs the action
• hasta que queda más cremosa = the sauce changes state

So the subject switches logically, even though Spanish does not repeat la salsa.

You could expand it as:

• Mi prima sabe batir la salsa hasta que la salsa queda más cremosa que antes.

But that repetition would sound unnecessary.

Yes, very possibly.

Saber + infinitive often implies practical know-how, and in context it can suggest skill or competence, not just theoretical knowledge.

So Mi prima sabe batir la salsa can sound like:

• she knows how to do it
• she has learned how to do it properly
• she is good at doing it

The exact nuance depends on context, but it definitely suggests more than just abstract knowledge.

Not exactly.

• sabe batir = she knows how to whisk/beat it properly
• puede batir = she can/is able to whisk/beat it

Sabe focuses on skill or know-how. Puede focuses on ability, possibility, or permission.

So if you want to highlight cooking skill, sabe is the better choice.

Yes.

• prima = female cousin
• primo = male cousin

So Mi prima clearly tells you the cousin is female.

That also helps explain why the first verb is sabe rather than, for example, a form that would refer to multiple people.