This is a really great base recipe for peanut butter cookies. You can do so many things with it. And if you want even more of a crunch, this would be really fun to try with crunchy peanut butter instead of smooth or even add some chopped peanuts like I did in my peanut butter blondies recipe.
Add the brown sugar, peanut butter, and butter to a bowl of a stand mixer and beat until smooth and creamy. Add the eggs, one at a time, beating after each addition until completely combined.