01 -
Preheat oven to 350°F. Generously grease a 9x13 inch glass or ceramic baking dish with nonstick spray or softened butter to prevent sticking.
02 -
In a large bowl, whisk instant chocolate pudding mix and 2 cups cold milk vigorously for 2 minutes until thick and glossy.
03 -
Pour pudding evenly into the prepared baking dish, smoothing to the edges.
04 -
Sprinkle chocolate cake mix evenly over the pudding layer without mixing.
05 -
Warm peanut butter in a microwave-safe bowl for 20 to 30 seconds until pourable. Drizzle over the cake mix layer in ribbons.
06 -
Scatter chopped mini peanut butter cups evenly, pressing some into the corners. Sprinkle chocolate chips over the top if using.
07 -
Bake 35 to 40 minutes until the top is dry, lightly cracked, and the center springs gently when touched. Edges may bubble.
08 -
Let rest for 10 minutes before serving warm. Optionally top with whipped cream, vanilla ice cream, or extra chopped peanut butter cups.