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Do the scriptures mention anything about this? Can brahmins drink alcohol?

No, Brahmins cannot consume alcohol under normal circumstances.

The twelfth Chapter of the Parashara Smriti discuses the possible expiation of the sin a Brahmana accumulates after consuming alcohol:

A Brahman who has drunk wine must go to a river
that falls into the sea; he must perform a Chandrayana,
which being finished, he is to give a feast to the Brahmans,
and by way of a fee, he is to give a cow and a bull to the
Brahmans. (75) If a Brahman has drunk wine only once, he must
drink flaming hot spirituous liquor; thereby he will purify
himself, both as regards this world, and as regards the other
world. (76)

According to the Smritis, not only Brahmins, none of the twice-borns are allowed to drink spirituous liquors.

Manu Smriti 9.235. The slayer of a Brahmana, (A twice-born man) who
drinks (the spirituous liquor called) Sura, he who steals (the gold of
a Brahmana), and he who violates a Guru’s bed, must each and all be
considered as men who committed mortal sins (mahapataka)

Drinking liquor, in fact, is considered as one of the five great sins (mahapataka) as you can see.