For the crust and topping:
2 1/4 cups quick oats
1 1/4 cups brown sugar, firmly packed
1 cup flour
1/2 teaspoon baking soda
1 cup butter, softened
1 (14-ounce) can sweetened condensed milk
1/4 cup peanut butter
1/2 teaspoon vanilla
12 ounces or 2 cups semisweet chocolate chips
1/2 cup chopped nuts, optional
- Preheat oven to 350 degrees. Line a 9 x13” baking dish with foil and spray with cooking spray.
- Combine all crust and topping ingredients in a large bowl. Mix with a hand mixer until crumbly (you may need to use your hands to finish this step). Reserve 2 cups of the mixture and press the rest into the bottom of the prepared pan.
- Mix sweetened condensed milk, peanut butter, and vanilla in a small bowl with a hand mixer. Pour and spread over crust. Top evenly with chocolate chips and nuts if using. Press remaining crust mixture evenly over the top of the chocolate chips.
- Bake for 25-30 minutes until it is brown around the edges. The center will not be set. Let completely cool before cutting into bars.