Alice B. Toklas (brownie), n. — Green’s Dictionary of Slang

Alice B. Toklas (brownie) n.

[proper name Alice B. Toklas (1877–1967), lifetime companion to Gertrude Stein, who in her eponymous cookbook gave a recipe for this drug-based sweetmeat]

(drugs) a marijuana brownie.

1968		[film title] I Love You, Alice B. Toklas.
1971		E.E. Landy Underground Dict. (1972).
1978		A. Maupin Tales of the City (1984) 136: Mrs Madrigal had come to her table with a basket of Alice B. Toklas brownies.
2001		ONDCP Street Terms 1: Alice B. Toklas — Marijuana brownie.