Step 1

HEAT oven to 350°F. Coat a large (13 x 9-inch) baking pan with no-stick cooking spray, tab of butter or parchment paper.

Step 2

BEAT together brown sugar, butter and vanilla in a large bowl with the mixer on medium speed until fluffy. Stir in oats, flour, baking soda and salt until dough forms. Reserve 1 cup of dough for topping. Press remaining dough into prepared pan to form a crust.

Step 3

COMBINE sweetened condensed milk and peanut butter in a medium bowl until smooth. Spread evenly over dough. Crumble reserved dough over top. Sprinkle evenly with chocolate pieces.

Step 4

BAKE 34 to 36 minutes or until golden brown. Cool completely. Cut & enjoy.