Chocolate Peanut Butter Oat Bars
adapted from

1 cup butter (I used 2/3 cup butter)
1/2 cup packed brown sugar
1 teaspoon vanilla extract
3 cups quick cooking oats (suggested to use between 2 3/4 and 3 1/4 cups, just enough to keep moist but not too wet or too dry)
1 cup semisweet chocolate chips (suggested to use 1 1/4 cups, a mixture of Milk and Semi-Sweet chips)
1/2 cup peanut butter (suggested to use 3/4 cup)

Grease a 99 inch square pan. (May use an 88 pan with foil and sprayed with PAM)

Melt butter in large saucepan over medium heat. Stir in brown sugar and vanilla. Mix in the oats. Cook over low heat 2-3 minutes, or until ingredients are well blended. Press half of mixture into the bottom of the prepared pan. (Suggested to press 2/3 mixture in bottom of pan)Reserve the remainder for topping.

Meanwhile, melt chocolate chips and peanut butter in a small heavy saucepan over low heat, stirring frequently until smooth. Pour the chocolate mixture over the crust in the pan, and spread evenly with a knife or the back of a spoon.

Crumble the remaining oat mixture over the chocolate layer, pressing in gently.
Cover, and refrigerate 2-3 hours or overnight. Bring to room temperature before cutting into bars.