The Villains claimed a 4-0 on Wednesday night, thanks largely to Buendia.
The Argentine, signed from Norwich for £33m this summer, provided two first-half assists for Ollie Watkins.
A pair of youngsters Jaden Philogene-Bidace and Aaron Ramsey, brother of Jacob, scored two more goals in the second-half.
Villa boss Dean Smith was forced to self-isolate and missed the game.
"Craig Shakespeare will take charge of the team this evening."
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