100mg should be plenty strong. From the link aesthyrian posted, I've tried the Incredible mint chocolate bar, cheeba chew, and the growing kitchen cookie.
The cheeba chew is gross and the growing kitchen cookie is nothing memorable. However the growing kitchen also makes something a little more exotic that's pretty good; it's called a zoom ball and made with coconut, seaweed, and fig.
The Incredible bar is aptly named- tastes just like an andes mint. They make a banana taffy and a strawberry (chocolate I believe) flavor as well. Banana is good, not sure about strawberry but it's prob pretty tasty. And according to the study the mint chocolate is underrated: 146mg instead of 100.
Unless you have a high tolerance I probably wouldn't eat more than ~100mg in one sitting.