Melton Mowbray Pork Pies, sausage rolls and Scotch eggs featured among the picnic food favourites, with sales up 76% for each. Trifle was also up 28% year-on-year.
Tubes of red, white and blue icing also rocketed, with growth in sales up 637%.
Mark Price, managing director, Waitrose, said: “The prospect of a long weekend and a wonderful focus for celebration spurred shoppers into action. Many people clearly welcomed having a great reason to step away from day-to-day budgeting to stock up on fabulous food and drink for Jubilee parties and entertaining.”