Quand vous aurez goûté cette tarte, vous verrez qu’elle reste moelleuse même le lendemain.

Aurez goûté is the future perfect (also called the futur antérieur).

It is formed with:

• the future of avoir → vous aurez
• the past participle of goûter → goûté

So:

• vous aurez goûté = you will have tasted

It is used here because the sentence is talking about one future action happening before another future action:

• first: you will have tasted this tart
• then: you will see...

French often uses the future perfect after quand when it means once / after something has happened in the future.

Both are possible in some contexts, but they do not emphasize exactly the same thing.

• Quand vous goûterez cette tarte... = When you taste this tart...
• Quand vous aurez goûté cette tarte... = When you have tasted this tart / Once you’ve tasted this tart...

The version with futur antérieur highlights completion. It suggests:

After you’ve tasted it, then you’ll realize...

So the sentence is not just about the moment of tasting, but about what you will understand once that action is finished.

Because the whole situation is in the future.

• vous verrez = you will see

The speaker is predicting what the listener will realize later. In French, just like in English, if the realization happens in the future, the verb is put in the future tense.

So the structure is:

• Quand vous aurez goûté... = future action completed
• vous verrez... = future result

In French, que becomes qu’ before a vowel or a silent h.

So:

• que elle → qu’elle

This is called elision. It happens very often in French:

• je aime → j’aime
• ne a → n’a
• que il → qu’il

So qu’elle reste moelleuse simply means that it stays soft/moist.

This is very natural in French.

In vous verrez qu’elle reste moelleuse, the speaker is saying what you will discover to be true: that it stays soft/moist.

French often uses the present tense after verbs like voir, constater, remarquer, etc., when expressing a general fact or a property of something.

So the idea is:

• you will see (future moment of realization)
• that it stays soft (fact about the tart)

English often does something similar:

• You’ll see that it stays soft...

Moelleuse describes a texture. For cakes, breads, or pastries, it usually means something like:

• soft
• light
• moist
• tender

In this sentence, the idea is that the tart does not become dry or hard quickly. So moelleuse is probably best understood here as soft and moist.

Also, moelleuse is the feminine singular form because it describes cette tarte, and tarte is feminine.

The masculine form would be moelleux.

Because adjectives in French usually agree with the noun they describe in gender and number.

Here:

• tarte is feminine singular
• so the adjective must also be feminine singular

That gives:

• masculine singular: moelleux
• feminine singular: moelleuse

This agreement is one of the most important patterns in French grammar.

Le lendemain means the next day or the following day.

In this sentence:

• même le lendemain = even the next day

It refers to the day after the tart is made, served, or tasted. The point is that the tart is still soft on the following day.

French often uses expressions like:

• le lendemain = the next day
• la veille = the day before
• le surlendemain = the day after the next

Because le lendemain is a fixed expression.

In many time expressions, French uses the definite article where English may not focus on one:

• le matin = in the morning
• le soir = in the evening
• le lendemain = the next day

You can also see lendemain without le in certain expressions, such as:

• le lendemain de la fête
• un lendemain difficile

But in this sentence, même le lendemain is the normal idiomatic form.

Même here means even.

So:

• le lendemain = the next day
• même le lendemain = even the next day

It adds emphasis. The idea is that it is somewhat impressive or surprising that the tart is still soft not only on the same day, but even the following day.

Because goûter can be a direct transitive verb in French.

So you say:

• goûter quelque chose = to taste / try something

That is why the sentence has:

• goûté cette tarte not
• goûté à cette tarte

Be careful, though:

• goûter quelque chose = taste/try something
• goûter à quelque chose can also exist, but it often has a slightly different nuance, more like have a taste of or sample

In this sentence, goûter cette tarte is the most straightforward choice.

It could be either.

In French, vous can mean:

• you (formal singular)
• you (plural)

So without more context, the sentence could be addressed:

• to one person politely
• or to several people

This is very common in French, and only context tells you which meaning is intended.

The comma separates the introductory quand clause from the main clause:

• Quand vous aurez goûté cette tarte, = subordinate time clause
• vous verrez... = main clause

This is also common in English:

• When you’ve tasted this tart, you’ll see...

The comma helps make the sentence easier to read, especially when the time clause comes first.