It was the second straight game where the England international scored twice, which helped him tally a 9.1 Flashscore player rating – the joint-highest of the midweek round.
Tottenham defender Cristian Romero matched Foden's rating with two goals in a draw at Newcastle, however the City man edges it this time for his impact in a crazy victory.
Foden's first was a wonderful curled effort from the edge of the penalty area, which found the top corner to extend City's lead shortly before half-time.
His double came early in the second half when the ball fortunately fell his way before he lashed a shot in at the near post.
Second-placed City next play host to Sunderland in the Premier League on Saturday.