Cidery flavor

[EvanAltman36]

Just bottled a 2.5 gallon batch of IPA that smelled amazing and tasted great, even flat. This recipe was from my own mind, with some guidance from a couple others I've seen. In any case, my question references the first batches I ever brewed, which were done with Mr. Beer LME. The Czech pilsner and also Mexican cerveza have a distinct cidery flavor that's not unbearable, but is just a bit off-putting. Is this an LME thing, a Mr. Beer thing, or perhaps the result of having an LME canister that's just past its prime. Drinkable, just not great.

 

[LarryBrewer]

Could be 'extract twang', which comes from old or less than top grade extract. Cidery flavor could also be from sugar additions, or simply it is the priming sugar you are noticing. If it goes away with time - could be the priming sugar, otherwise probably the ingredients.