Jeg venter med glasuren, indtil kagen er helt kold.

Because vente med is a common Danish expression meaning to wait before doing something or to hold off on something.

• vente on its own = to wait
• vente med + noun / action = to postpone or wait before using/doing

So Jeg venter med glasuren does not literally mean that the speaker is standing around together with the icing. It means they are holding off on the icing until later.

Very often, Danish uses vente med where English might say:

• I’ll wait with the icing
• I’ll hold off on the icing
• I won’t add the icing yet

Glasuren is the definite form, meaning the icing.

In Danish, nouns usually add an ending to express the:

• en glasur = an icing / a glaze
• glasuren = the icing

So the ending -en works like the English article the.

The same thing happens with kagen:

• en kage = a cake
• kagen = the cake

Because Danish often leaves that idea understood from context.

In English, we might say:

• I’m waiting to put the icing on
• I’m waiting before adding the icing

Danish can express the same idea more briefly with Jeg venter med glasuren. The exact action is implied: you are waiting before using, adding, or putting on the icing.

This is very natural in Danish.

Indtil means until.

It introduces the point in time when something changes or becomes possible. In this sentence, the waiting continues until the cake is fully cool.

Structure:

• main clause: Jeg venter med glasuren
• subordinate clause with indtil: indtil kagen er helt kold

So indtil works much like English until.

Because after indtil, Danish uses a subordinate clause, and subordinate clauses normally keep the order:

subject + verb + other elements

So:

• kagen = subject
• er = verb
• helt kold = complement

That gives:

indtil kagen er helt kold

This is normal Danish subordinate-clause word order.

Here helt means completely, entirely, or fully.

So:

• kold = cold
• helt kold = completely cold / fully cooled

In natural English, you might translate it as:

• completely cool
• fully cooled down
• totally cold

In this sentence, helt emphasizes that the cake must not be even a little warm before the icing is added.

Danish often uses kold in situations where English might naturally say cool.

So although kold literally means cold, in cooking contexts it can simply mean that something has cooled down fully and is no longer warm.

That is why English might translate the sentence more naturally as:

• until the cake is completely cool

rather than the more literal:

• until the cake is completely cold

Both are possible, but cool sounds more natural in English for baking.

Because Danish punctuation often places a comma before a subordinate clause.

Here, indtil kagen er helt kold is a subordinate clause, so the comma separates it from the main clause:

• Jeg venter med glasuren,
• indtil kagen er helt kold.

You may notice some variation in comma use depending on comma style taught or preferred, but this comma is very normal and standard in Danish writing.

Yes, but it means something slightly less specific.

• Jeg venter, indtil kagen er helt kold = I wait until the cake is completely cool
• Jeg venter med glasuren, indtil kagen er helt kold = I wait with the icing / I hold off on the icing until the cake is completely cool

The version with med glasuren makes it clear what is being postponed: the icing.

Without med glasuren, the sentence is more general.

Yes. Glasur can refer to:

• icing on cakes
• glaze
• sometimes a coating, depending on context

In this sentence, because we are talking about a cake, glasuren clearly means the icing/frosting/glaze on the cake.

The best English choice depends on context and region:

• icing is very natural
• frosting may also work, especially in American English
• glaze works if it is a thinner, shinier coating

Yes, it is natural and idiomatic.

A Danish speaker would understand that the person is waiting before applying or using the icing. It sounds like normal spoken and written Danish.

Other natural ways to say something similar could include:

• Jeg kommer først glasur på, når kagen er helt kold.
• Jeg venter med at komme glasur på, indtil kagen er helt kold.

But the original sentence is already perfectly good, natural Danish.