Break-up peanuts (I use a rolling pin and a plastic bag) and roast them on a cookie sheet in the oven for 8 minutes or so, stirring a couple of times. Be careful, they are easy to burn. Set aside.
Mix with fork in a bowl:
1 cup flour and 1/2 teaspoon baking soda.
Mix in another bowl: 1 egg, 1 cup brown sugar, 1/4 cup milk (or whatever) then add 1 cup crunchy peanut butter and mix.
Add roasted peanuts and optionally 1/2 cup dark chocolate chips -- if you use these you might want to add another 1/8 cup sugar.
Mix the flour and egg mixtures together. Use a spoon to make balls and roll them between your palms to get them smooth and flatten them on a greased cookie sheet with a fork. Or, if you don't use chocolate chips you can push a large chocolate wafer-drop into the center of the ball to flatten it.
Bake 12 at a time as close to the center of the cookie sheet as you can, keeping away from the edges where the heat wraps around. Bake about 10 minutes (depending on your oven) and cool on a rack.