Der er en masse mad.

In Der er en masse mad, der is an existential word, like English there in there is/there are. It does not mean there as a location here.

So:

• Der er... = There is / There are...

This is a very common Danish pattern for introducing the existence of something.

Er is the present tense of at være = to be.

So:

• der er = there is / there are

Danish uses the same form er regardless of whether English would say is or are.

This is a very common learner question.

• der er is used to say that something exists or is present
• det er is used to identify or describe something

Compare:

• Der er en masse mad. = There is a lot of food.
• Det er mad. = It is food.

So in your sentence, the point is that a lot of food is present, so der er is the right choice.

En masse means a lot of, lots of, or plenty of.

In this sentence:

• en masse mad = a lot of food

It is a very common everyday expression.

Because masse is a noun, and in this expression it keeps its article:

• en masse literally looks like a mass
• but as a fixed expression, it means a lot

So you should learn en masse as a chunk.

You do not normally change it to match the following noun. For example:

• en masse mad
• en masse mennesker
• en masse problemer

Usually, yes, when it means a lot of.

It is a fixed, informal, very common expression. You can use it with both countable and uncountable nouns:

• en masse mad = a lot of food
• en masse bøger = a lot of books

So it works a bit like English a lot of.

Yes. Der er meget mad is completely natural and means almost the same thing.

There is a slight nuance:

• Der er meget mad = there is a lot of food
• Der er en masse mad = there is lots of food / a whole lot of food

En masse often sounds a bit more conversational and a little more expressive.

Mad is the normal everyday word for food in Danish.

• mad = food, meals, something to eat

Føde exists, but it is much less common in everyday conversation and sounds more formal, technical, or old-fashioned in many contexts.

So mad is exactly the natural word here.

Here mad is an uncountable noun, like English food.

That means it is treated as a general substance or category, not as separate countable items.

So:

• mad = food in general

If you want to talk about individual items, you would usually use different words, depending on what you mean:

• retter = dishes
• madvarer = food items / groceries

The basic structure is:

• Der
  • verb
    • rest

So:

• Der = existential there
• er = is/are
• en masse mad = a lot of food

Danish main clauses usually follow verb-second word order, and der er is one of the most common patterns learners see early on.

Yes, but the word order changes in a Danish way.

For example:

• Der er en masse mad i køleskabet. = There is a lot of food in the fridge.
• I køleskabet er der en masse mad. = In the fridge, there is a lot of food.

Notice that when another element comes first, er still comes before der:

• I køleskabet er der...

That is normal Danish word order.

In careful pronunciation, roughly:

• der ≈ dehr
• er ≈ air or a very reduced er
• en masse ≈ en ma-se
• mad ≈ maelth / math depending on accent and how detailed you want to be

In natural speech, der er is often pronounced very smoothly and reduced, almost like one unit.

A rough learner-friendly approximation could be:

dehr-air en MAS-se math

But it is best to listen to native audio, because Danish pronunciation is often much more reduced than the spelling suggests.

It is completely natural, neutral everyday Danish.

• Der er meget mad may sound a little more neutral/plain
• Der er en masse mad sounds a bit more conversational

But both are perfectly normal.