
die Kostprobe
sample
A small amount of a food or drink that you try in order to test the taste.
Auf dem Markt gab es kostenlose Kostproben von verschiedenen Käsesorten.
At the market, there were free samples of different kinds of cheese.
sample
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sample
A small amount of a food or drink that you try in order to test the taste.
Auf dem Markt gab es kostenlose Kostproben von verschiedenen Käsesorten.
At the market, there were free samples of different kinds of cheese.

sample
A short excerpt or small demonstration of something, intended to give a first impression.
Der Trailer zum Film gibt eine gute Kostprobe von der Action, die uns erwartet.
The film trailer gives a good sample of the action that awaits us.
The word is made up of 'Kost' (a formal word for food/nourishment) and 'Probe' (test/sample). So a 'Kostprobe' is literally a 'food test.'
Nehmen Sie doch eine Kostprobe von unserem neuen Olivenöl.
Please take a sample of our new olive oil.
The context makes clear which meaning is intended. If it is about food or drink, it means a small tasting portion. If it is about art, music, or abilities, it means a short, representative impression.
Hier ist eine Kostprobe vom Hochzeitskuchen.
Here is a sample of the wedding cake.
In connection with food, 'Kostprobe' (sample) is often used with the preposition 'von' (of/from). Typical verbs are 'anbieten' (to offer), 'bekommen' (to get), or 'nehmen' (to take).
Auf dem Weinfest habe ich viele kostenlose Kostproben bekommen.
At the wine festival, I got many free samples.
In this figurative meaning, a person's skill or work is often demonstrated. For example, you give 'eine Kostprobe seines Könnens' (a sample of his skill) or 'eine Kostprobe ihrer Schreibkunst' (a sample of her writing skill).
Der Autor las als Kostprobe das erste Kapitel seines Romans vor.
As a sample, the author read the first chapter of his novel aloud.
rehearsal / sample / test
A Probe can be a small amount used to test or assess a product. A Kostprobe, by contrast, is specifically intended for tasting food or drinks. „Probe“ fits a general test or sample amount; for testing the taste, „Kostprobe“ is the appropriate word.

Auf dem Markt nahm ich eine Kostprobe des neuen Safts.
At the market, I tried a sample of the new juice.
Das Labor prüft eine Probe des neuen Safts auf seine Qualität.
The laboratory is testing a sample of the new juice for quality.