Marina and Karl Hogarth's hand-made chocolate log has made it into a hamper presented to the Queen.

A Nelson-made chocolate log that started off as an experiment was in a New Zealand food hamper gifted to the Queen.

Hogarth Craft Chocolate's Milk Hazelnut Chocolate Log was one of 10 New Zealand products delivered by prime minister Jacinda Ardern at a private meeting with the Queen two weeks ago. Ardern was in London for the Commonwealth Heads of Government Meeting.

The Nelson boutique chocolate maker said it had no idea where the product, which won gold at the 2017 international chocolate awards, was destined for, when an Auckland stockist made an order for 50 several weeks ago.

Has the Queen had a taste of Hogarth's Milk Chocolate Hazelnut Log? The Nelson-made treat was included in a hamper that Jacinda Ardern gave to the Head of the Commonwealth last month.

"She just said make sure it has the gold international award sticker on it," said Marina Hogarth, who co-owns the business with husband Karl.

"When the prime minister was on her way to the UK, we found out that one of our hazlenut logs was in the hamper.

"It was a surprise," she laughed.

South Auckland-based country grocery store, Paddock to Pantry, had stocked the logs for about six months.

It put the hamper together after being asked to create a selection of NZ artisan foods suitable for the Queen.

It was "amazing" that the logs had been recognised as food fit for royalty, Hogarth said.

"They are all hand made, we make them one by one, even the packaging ... it takes us two, three days until they are ready"

They were produced in batches of about 800 every six weeks.

The first batch was produced only last year.

"It was always an experiment. It was last winter, we thought, let's give it a go, and then suddenly the log won a Gold award."

The Hogarths had fun imagining what might become of the log in the royal household.

"Is she going to eat it? Is she going to open it and slice it?"

Hogarth recommended just unwrapping and eating as is.