The House of Commons Environment, Food and Rural Affairs Committee, which had opened an investigation after an undercover media report revealed serious breaches at one of Boparans factories last year, wrote to the businessman to stress that the gifts were an "inappropriate gesture".
Neil Parish, chairman of the committee, said the gifts to several MPs were an "unwarranted attempt to impugn the Committee's impartiality".
"I would be grateful if you would respect the integrity and independence of the committee and avoid similar gestures in future,"he said in a letter to Boparan.
However, the company stressed there was nothing sinister in the Christmas presents.
"It was approximately eight packets of Foxs and Own Brand Biscuits which we send every year to a number of external stakeholders as a goodwill gesture at Christmas. We have responded formally to Parish explaining this," a 2 Sisters Group spokesperson said.
Boparan had apologised for the hygiene scandal involving his West Bromwich factory and pledged a number of measures to improve standards, including increasing training for his workforce and installing cameras to monitor staff.
Other sections of the footage, which was filmed in August 2017, showedchickenbeing picked off the floor and thrown back on to the production line, and older poultry being mixed with fresher birds.
The parliamentary committee had acceptedBoparans written assurance of additional safety measures at all his plants and said that it would be closely monitoring their implementation with a view to investigating further if required.
The 2 Sisters Food Group sold the frozen pizza brands to Nomad Foods and plans to focus on its core business as one of the UK's largest poultry suppliers.
"This deal represents our first major step to transform 2 Sisters and build a better business...The net proceeds from the sale are intended to be used to repay debt and to invest in the group's core businesses, Boparan said.
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