Im Kühlschrank stehen noch Quark und Sahne, deshalb brauchen wir heute nichts mehr einzukaufen.

In German, all nouns are capitalized, not just proper names. So Kühlschrank (fridge), Quark, and Sahne are written with capital letters because they are nouns.

This is one of the most noticeable spelling differences from English.

im is the contraction of in dem.

Here, German uses the dative case because the phrase answers where? rather than where to? The quark and cream are already inside the fridge, so German says im Kühlschrank.

Compare:

• im Kühlschrank = in the fridge / located there
• in den Kühlschrank = into the fridge / movement toward it

German often uses position verbs more specifically than English does.

• stehen = to stand
• liegen = to lie
• hängen = to hang

For food containers or items thought of as standing upright, German often says they stehen somewhere. That is very natural with things in a fridge, especially if they come in tubs, cartons, or containers.

So Quark und Sahne stehen im Kühlschrank sounds more idiomatic than just using sein.

Because the subject is Quark und Sahne — two things joined by und.

A subject with A und B normally takes a plural verb in German.

So:

• Der Quark steht im Kühlschrank.
• Quark und Sahne stehen im Kühlschrank.

Here noch means something like still or left.

It suggests that these items are already available and have not been used up yet.

So Im Kühlschrank stehen noch Quark und Sahne means not just that they are there, but that there is still some quark and cream left in the fridge.

Because Quark and Sahne are being used as mass nouns here, referring to some unspecified amount, much like English says We still have cream rather than We still have the cream.

German often leaves out the article with food items and substances when speaking generally or about an unspecified quantity.

You could use articles in other contexts, but here the article-less form is very natural:

• noch Quark und Sahne = still some quark and cream

Quark is a very common dairy product in German-speaking countries. It is a fresh soft cheese with a texture somewhere between yogurt, cream cheese, and very thick curd.

There is no perfect everyday English equivalent, so translations vary depending on context:

• quark
• curd cheese
• soft cheese
• sometimes something like farmer cheese or fromage frais, depending on the variety

It is completely unrelated in meaning to the English scientific word quark, even though the spelling is the same.

Because the sentence contains two main clauses:

• Im Kühlschrank stehen noch Quark und Sahne
• deshalb brauchen wir heute nichts mehr einzukaufen

deshalb is an adverb meaning therefore / that’s why, not a conjunction like und or aber. Since it starts a new main clause, German normally separates the clauses with a comma here.

German main clauses follow the verb-second rule. That means the conjugated verb must come in the second position.

In this clause, deshalb takes the first position, so the verb brauchen must come next, and the subject wir comes after the verb:

• Deshalb brauchen wir ...

This is a very common pattern in German:

• Heute gehen wir ...
• Dann machen wir ...
• Deshalb brauchen wir ...

Here brauchen means to need in the sense of not needing to do something.

In German, brauchen is very often used this way in a negative context, usually with words like:

• nicht
• nichts
• kein
• nie

So wir brauchen heute nichts mehr einzukaufen means we don’t need to buy anything else today.

This is close in meaning to:

• Wir müssen heute nichts mehr einkaufen.

But brauchen directly highlights the idea of lack of necessity.

Because nichts stands on its own and means nothing or not anything, while kein must go with a noun.

So:

• nichts mehr = nothing more / nothing else
• keine Milch mehr = no more milk

In this sentence, there is no noun after it, so nichts mehr is the correct choice.

Also, mehr here means any more / else / further.

It is built into the infinitive form.

The verb is einkaufen, which is a separable verb:

• prefix: ein-
• base verb: kaufen

When a separable verb is used with zu, the zu goes between the prefix and the verb stem:

• einkaufen → einzukaufen
• anfangen → anzufangen
• aufräumen → aufzuräumen

So einzukaufen already contains the zu.

einkaufen often means to shop, especially to buy groceries or household supplies. In a sentence about what is still in the fridge, that fits very naturally.

So this sentence is not just about buying one random item; it suggests doing the grocery shopping or buying what we still need.

You could say zu kaufen in some contexts, but einzukaufen sounds more idiomatic here.