Lightly grease a 9×13 cake sheet pan, or line the bottom with parchment paper. Set aside. Sift together the flour, sugar, salt, baking soda and cinnamon. Set aside. In a separate bowl beat together the eggs and vegetable oil. Stir in vanilla. Add the oil mixture to the flour mix, and gently combine. Stir in the pineapple and pecans. Plus, one of the most popular places to buy a graduation cake is actually Costco. In 2012, Costco sold around one million sheet cakes during the eight-week graduation season! These half sheet cakes weigh in at about 9.5 pounds, measures 12 inches by 16 inches, and can serve around 48 people.

Jan 22, 2018 · It'll set you back less than 20 bucks — $18.99, to be exact — to order a half sheet cake from Costco. Chances are, you couldn't beat that price even if you made one yourself. It beats out the ...