The international building code specifies a maximum riser height of 7 inches so a single laminate plank usually suffices but you may prefer to use pine poplar or some other stainable wood instead.
How to finish stairs with laminate flooring.
Once this is done measure and cut out your pieces of laminate to make tread pieces riser pieces and stair nosing.
With the addition of a laminated stair nose it rivals all other materials for wear durability and appearance.
Alternatively you could cover the overhang with plywood to make it level.
Measure each tread separately as stairs are often slightly out of square and even very small gaps will be visible in the finished product.
The risers go on next.
Cut a piece of laminate flooring for each tread.
How to finish stairs with laminate.