High Fructose Corn Syrup will do the trick..You will put weight on believe me.It enters the body not as a typical sugar does(being broken down by liver),so it's skipping the metabolic process..There is a Princeton University study on this so you can read more..It's molecular structure is different and it stores as fat immediately... Try and buy it in liquid syrup form from your local supermarket...It should be located in the section that has honey,sugar and artificial sweetners...

link>>Princeton University - A sweet problem: Princeton researchers find that high-fructose corn syrup prompts considerably more weight gain