Ingredients:
- box (approx. 15.25 oz / 432g) chocolate cake mix
- Ingredients listed on cake mix box (eggs, oil, water substitute)
- cup (240 ml) hot strong brewed coffee
- cup (250g) creamy peanut butter (smooth style)
- can (14 oz / 396g) sweetened condensed milk
- /2 cup (120 ml) whole milk
- cup (2 sticks / 226g) unsalted butter, softened
- cups (360g) confectioners' (icing) sugar, sifted
- /2 cup (45g) unsweetened cocoa powder, sifted
- /2 teaspoon vanilla extract
- –5 tablespoons whole milk or heavy cream (for frosting)
- /2 cup (80g) mini peanut butter cups or chopped salted peanuts (Garnish)
Instructions:
- Preheat oven and grease/line a 9x13 inch baking dish. Prepare the cake mix according to package directions, substituting the required water with 1 cup of hot brewed coffee. Pour batter into the dish and bake for 30–35 minutes, or until a skewer inserted near the centre comes out clean. Let cool in the pan for 15 minutes.
- While the cake is still slightly warm, use a long wooden skewer or spoon handle to poke holes evenly across the entire surface of the cake, poking deeply without piercing the bottom of the pan.
- In a medium bowl, whisk together the creamy peanut butter, sweetened condensed milk, and 1/2 cup of milk until smooth and fully combined. The mixture will be thick.
- Slowly drizzle or pour the entire peanut butter mixture evenly over the warm cake, ensuring the mixture seeps down deeply into the poke holes.
- Cover the cake loosely and refrigerate for at least 1 hour (or until the filling is mostly set and cool to the touch) to allow the moisture to fully penetrate.
- For the frosting, cream the softened butter. Gradually beat in the sifted cocoa powder and icing sugar alternately with 3-5 tablespoons of milk/cream until the frosting is light and fluffy. Beat in the vanilla extract.
- Spread the chocolate frosting generously over the chilled cake. Sprinkle immediately with chopped peanut butter cups or salted peanuts before serving.