I was experimenting with my peanut butter cookie recipe and this is the result. As I haven't shared them with anyone yet for an opinion, you'll have to take my word for them being soft, chewy and flavorful.
Place margarine / butter, peanut butter and snickers bar pieces in a microwavable mixing bowl. Microwave on high for 2 to 2 1/2 minutes. Remove from microwave and stir until smooth and creamy.
add sugars and vanilla. Stir until smooth. Test mixture for temperature and if not too hot, add eggs and mix well. (If mixture is still hot, wait a few minutes, so as not to cause eggs to set up)
add flour, walnuts and oatmeal, stirring as adding until all ingredients are thoroughly mixed.
Place one level tablespoon of mixture onto a lightly greased cookie baking sheet. Leave approximately one inch between cookies as they will spread out while baking. Bake for 10 to 15 minutes or until tops are lightly brown.
Allow cookies to cool completely before removing them from the cookie sheet.