Gfyuki

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).

Usana Smriti says:

THE destroyer of a Brahmanas, one who drinks spirituous liquors, a
thief, and the violator of the preceptor's bed, and the one who
associates with them, are the great sinners.

Chapter 8, Verse 1

Same thing is repeated in Chandogya Upanishad 5.10.9:

Steno hiranyasya surAm pivamshacha gurostalpamAvasan brahmahA |

Chaite patanti chatvArah panchamashchAcharamstaih ||

One who steals gold, who drinks Sura, who cohabits with the Guru's
wife and one who slays a Brahmin - these four and the the fifth, who
associates with these four - all of these five become fallen.