Zouma helped Chelsea to win the Capital One Cup as well that year, before things turned sour for the Portuguese boss.
Just seven months after guiding them to the title, Mourinho was sacked following a dismal start to the campaign.
The players received a lot of criticism for their poor displays but ultimately Mourinho was the one who had to take responsibility, and Zouma doesn't feel guilty about it.
“My first year at Chelsea we won the Capital One Cup and then the Premier League," he told The Mirror.
Kurt Zouma has recently returned to the first team fold at Chelsea
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I was dreaming. But managers go. It’s part of football. I don’t feel guilty. Mourinho’s gone, let’s think about the future.
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"I was dreaming. But managers go. It’s part of football. I don’t feel guilty. Mourinho’s gone, let’s think about the future.
“It was a bad season, now we are doing well again."
Under Antonio Conte, Zouma is enjoying his football again after being sidelined for 12 months with an anterior cruciate ligament injury.
And he admits he was grateful for the chance to be included in Chelsea's pre-season tour to the USA.
Kurt Zouma is enjoying life under Antonio Conte
Jose Mourinho was sacked just seven months after guiding Chelsea to the title
Zouma added: "Conte loves what he does. He wants to give that special feeling to us. We need to love football like he does, to breathe football. That’s what he wants.
“I was really pleased when I learned I was going to America. I didn’t know him (Conte) before, he didn’t know me.
"He’d just watched me in the odd game on TV, but just one or two times maybe. Then he said he trusted me. Those words made a difference."
Zouma made his first Premier League appearance under Conte in Chelsea's 3-1 win over Arsenal on Saturday.