Preheat the oven to 350 degrees and spray an 8×8 baking dish with nonstick spray. Set aside.

With an electric or stand mixer, mix the brown sugar and peanut butter on medium speed until light in color and fluffy, about 3 minutes.

Mix in the vanilla, scraping down the sides as needed.

On medium speed, add in the flour, oats, salt, and baking soda. The dough will be very thick and clumpy.

Slowly add the milk in a steady stream, mixing until a dough forms.

Fold in chocolate chips.

Once dough is completely combined, press it lightly into the prepared baking dish.

Bake for about 17-20 minutes until the bars are lightly golden and set. Allow to cool completely and cut into squares.

*I melted 2 tablespoons of chocolate chips with 1 tablespoon of peanut butter for the chocolate drizzle. I could eat this concoction on its own. Holy cow.

Store in the refrigerator in a covered container. Bars will be good stored up to 2 weeks. Like they'll last that long.