Combine peanut butter, butter, eggs, cake mix and vanilla in the bowl of an electric mixer and beat at medium speed until well combined. Gently mix in the Rice Krispies. Press half the mixture into the bottom of the pan. Sprinkle with chocolate chips and pour on the sweetened condensed milk. Top with remaining cake mixture.
Bake for 30 minutes. Cool completely on a wire rack and cut into squares.
Notes
Makes 16 bars.
Recipe by DessertedPlanet.com at https://dessertedplanet.com/peanut-butter-gooey-bars/