Mr Hutton announced plans in January for a new generation of nuclear plants to replace the UK's 10 ageing stations.
But Mr Hutton told the FT he would be "disappointed" if the proportion of energy generated by nuclear did not rise above the current 19%.
He pledged to "keep our foot down on the pedal" for more nuclear power.
Mr Hutton says private operators will be expected to meet the full cost of building nuclear plants, decommissioning and disposing of waste.
But he has said no "artificial cap" would be put on the proportion of electricity to be generated from nuclear power or any other source of "low carbon" energy.
Asked by the FT if he wanted the share of electricity contributed by nuclear to increase above 19%, he said: "That's the ambition we should have...I'd be very disappointed if it's not significantly above the current level."