The 25-year-old -- who is also a judge on CBBC's Junior Masterchef -- says his granny Elizabeth Ryan has been a major influence on his cooking.
Fans of the RTE show will be treated to an appearance of his granny as the pair set to work creating a mouth- watering favourite dish.
"My granny raised my mum and her six siblings with very little income but that never stopped her from producing wonderfully elegant, yet inexpensive meals.
"Her long-ingrained home-making skills, using inexpensive materials and simple methods, are some the greatest kitchen tips that have been passed on to me.
"There is a whole army of grandparents, parents, aunts and uncles up and down the country who possess and use these skills without giving them a second thought."
The show will air on December 12 and will see Donal cooking up a storm with dishes such as Boxty Colcannon Pancakes, Skehan Family's Irish Stew and Irish Barmbrack on the menu.
The Howth local has enjoyed a stellar year having started out blogging about cooking in 2007.
Since then, his career has gone from strength to strength and as well as TV work, he has also penned several cookery books.
But, despite his success in the kitchen, Donal claims he would give it all up for another shot at a pop career.
"But I don't think anyone around me would advise it, because I cannot sing for peanuts," he added.