Preheat oven to 350.
In a large bowl, cream together butter, brown sugar, white sugar for several minutes and then add peanut butter and beat in until smooth.
Beat in the eggs one at a time until well blended.
Combine the flour, baking soda, and salt together in a bowl, then pour and stir into the wet mixture and mix until just combined.
Mix in the oats and 1/2 of chocolate chips until just combined.
Spread into 2 - 8x8 greased pans or a 13x9 greased pan, add saved out chocolate chips and sprinkle on top and bake for 25-30 minutes for 2 - 8x8 pans or 20-25 minutes for 13x9 pan or until just light brown.
Don't over-bake for best results
Cool, cut and store in an airtight container.