Der Geschmack des Kaffees erinnert mich an Urlaub.

In German, to express “the taste of the coffee,” you use the genitive case:

• des is the genitive singular masculine article
• Masculine and neuter nouns typically add -s (or -es) in the genitive singular, so Kaffee → Kaffees

Yes. Using von + dative is very common (especially in speech) as an alternative to the genitive:

• Der Geschmack von Kaffee erinnert mich an Urlaub.
  Both versions are correct; the genitive version sounds a bit more formal or literary.

The verb erinnern in its transitive sense (“to remind someone of something”) takes an accusative object for the person being reminded:

• jemanden an etwas erinnern → “to remind someone (acc.) of something”
  So you need mich (accusative), not mir (dative).

With erinnern (non-reflexive), you always use an + accusative to introduce what you’re reminded of:

• etwas erinnert mich an etwas
  Auf Urlaub means “on vacation,” which doesn’t convey “reminds me of vacation.”

Urlaub is treated as an uncountable, abstract concept (“vacation” in general). German often omits the article with generic or mass nouns. If you meant a specific trip, you’d include an article or adjective:

• an den Urlaub (a particular vacation)
• an meinen letzten Urlaub (to my last vacation)

The sentence follows the standard S-V-O-PP pattern in German main clauses:

1. Subject: Der Geschmack
2. Genitive attribute: des Kaffees
3. Verb (2nd position): erinnert
4. Direct object (acc.): mich
5. Prepositional object (an + acc.): an Urlaub

Yes. You can say:

• Der Kaffee schmeckt wie Urlaub.
  Here schmeckt means “tastes,” and wie introduces the comparison: “The coffee tastes like vacation.”

Add a possessive adjective for specificity:

• Der Geschmack des Kaffees erinnert mich an meinen Urlaub.
• Or even more natural: … an meinen letzten Urlaub.

It’s uncommon but possible in informal speech:

• zwei Urlaube → “two vacations”
  However, German usually treats Urlaub as a mass noun in the singular when speaking generally.