Prepare the Betty Crocker cookie mix according to package directions, typically by combining the mix with 1 stick of butter and 1 large egg to form a dough. Fold in 1 cup of marshmallows and chopped 1 Hershey bar into the dough. Crush the waffle cone and either mix it into the dough or sprinkle it on top of the cookies before baking. Cook at 325 degrees Fahrenheit for about 20 minutes for an ooey gooey texture.
