Jose Mourinho made seven changes to his side from the team that beat St Etienne in the Europa League last week.
Young was handed only his second start this year as he filled in for Antonio Valencia at right-back and he clearly impressed the Portuguese boss with his display.
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Ashley Young made only his second start this year
Some players, for example Ashley Young, can I rest Antonio Valencia? Oh yes, I can if Ashley Young plays this way.
Jose Mourinho
Mourinho said: "Some players, for example Ashley Young, can I rest Antonio Valencia? Oh yes, I can if Ashley Young plays this way.
“When I have people performing it is easier to make rotation.
“We are going to fight for that (to stay in all four) but the League Cup is the one we have 50 per cent possibilities to win.
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Jose Mourinho was impressed with Ashley Young's performance
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Ashley Young celebrates with Henrikh Mkhitaryan at Ewood Park
"And the next one is to get a result against Saint-Etienne and be in the last 16 (of the Europa League).”
Mourinho is likely to continue rotating his squad in the coming weeks with league, FA Cup, Europa League and EFL Cup commitments.