These days, while the aim is still true—the proceeds go to a good cause—the Tagalongs*, Thin Mints, and Samoas are made commercially, making for confections that arguably fall into "don't confuse the experience with the product" territory.
The solution? Do buy cookies from those earnest young Scouts. But also make a batch of your own for a delicious home-baked treat. Start with these Tagalongs: slightly fatter and more substantial than the Scout version, you'll enjoy each chocolatey, peanut buttery, shortbready bite.
Not into Tagalongs? More of a Thin Mints fan? Make Thin Mints instead »
* In some regions, Tagalongs are packaged under the name "Peanut Butter Patty." Different licensed bakeries that supply the Girl Scouts call the same cookies different names. Wiki up on it here.