Bánh xèo giòn và thơm; nước ép hơi chua.

In Vietnamese, adjectives can often act like the predicate by themselves, so you usually do not need a separate word for is/are.

So:

• Bánh xèo giòn và thơm = The bánh xèo is crispy and fragrant.
• Nước ép hơi chua = The juice is slightly sour.

Using là here would normally sound unnatural. Là is more commonly used to connect nouns, as in Đây là nước ép = This is juice.

Bánh xèo is the name of a Vietnamese dish, usually translated as a crispy savory pancake or crepe. It is a fixed food name, so learners usually treat bánh xèo as one vocabulary item.

Literally:

• bánh = cake, pastry, pancake, or other flour-based food
• xèo imitates the sizzling sound when the batter hits the pan

So the literal idea is something like sizzling cake, but in real use, bánh xèo just means the dish.

Vietnamese usually puts descriptive words after the noun.

So:

• bánh xèo giòn = crispy bánh xèo
• nước ép chua = sour juice

In your sentence, giòn và thơm are describing bánh xèo, and hơi chua is describing nước ép.

Also, Vietnamese often uses the same word order whether you think of it as:

• a noun with description, or
• a full sentence with an omitted is

That is one reason this structure may feel different from English.

• giòn means crispy or crunchy
• thơm means fragrant, aromatic, or nice-smelling

A useful point: thơm is about smell, not general tastiness.

So:

• ngon = delicious, tasty
• thơm = fragrant, aromatic

Food can be both:

• Bánh xèo ngon và thơm = The bánh xèo is delicious and fragrant.

Hơi means slightly, a bit, or somewhat.

So:

• chua = sour
• hơi chua = slightly sour / a little sour

It softens the description. Without hơi, nước ép chua sounds more direct: the juice is sour. With hơi, it sounds milder.

Here, chua means sour or tart, especially for taste.

Common examples:

• chanh chua = lemons are sour
• sữa chua = yogurt
• nước ép hơi chua = the juice is slightly sour

It does not mean bitter. For bitter, Vietnamese uses đắng.

The semicolon links two related statements:

• Bánh xèo giòn và thơm
• nước ép hơi chua

It shows that these are two separate but connected observations, probably about a meal.

You could also see other punctuation in natural Vietnamese, such as:

• Bánh xèo giòn và thơm. Nước ép hơi chua.
• Bánh xèo giòn và thơm, nước ép hơi chua.

The semicolon is just a neat way to separate the two descriptive clauses.

Vietnamese nouns usually do not need articles like a, an, or the, and they usually do not mark singular/plural unless that matters.

So nước ép could mean:

• juice
• the juice
• a juice

The exact meaning depends on context.

The same is true for bánh xèo. Depending on context, it could mean:

• bánh xèo in general
• the bánh xèo
• a bánh xèo

English requires more explicit marking than Vietnamese does.

Normally, no. That would sound unnatural in standard Vietnamese.

With ordinary adjectives such as giòn, thơm, chua, đẹp, cao, Vietnamese usually does not use là.

So the natural forms are:

• Bánh xèo giòn và thơm
• Nước ép hơi chua

Use là mainly when identifying or equating something with a noun:

• Đây là bánh xèo = This is bánh xèo.
• Anh ấy là bác sĩ = He is a doctor.

A few words here are especially worth noticing:

• bánh: the á has a rising tone
• xèo: the è has a falling tone
• ép: the é has a rising tone
• hơi: no extra tone mark, so it has the level tone
• chua: also no extra tone mark, so it has the level tone

A practical pronunciation tip:

• x in standard Vietnamese is like an s sound, so xèo starts roughly like seo
• giòn is roughly like zyon in the North and often more like yon in the South
• thơm has the vowel ơ, which does not exist in English, so it may take practice

If you want to sound natural, tones matter a lot more than in English, especially in short descriptive sentences like this one.