Step 1

Preheat oven to 350 degrees F (175 degrees C). Grease a 9x13 inch baking pan.

Step 2

In a large bowl, cream together the butter, white sugar and brown sugar. Beat in the eggs, one at a time, then stir in the 3/4 cup peanut butter. Combine the oats, flour and baking soda; stir into the creamed mixture until well blended. Press the dough evenly into the prepared pan.

Step 3

Bake for 15 to 20 minutes in the preheated oven, until firm. In the microwave or over a double boiler, melt chocolate chips and 1/2 cup peanut butter together, stirring frequently until smooth. Spread over cooled bars and allow to set up before cutting into squares.