chocolate peanut butter cake

this fluffy confection is baked in a 10-inch pan and is piled with marshmallows, caramel and peanut butter cups. slice it like a cake and serve it warm with ice cream.

Ingredients: 

Cookie: 

1 cup unsalted butter 

1/2 cup sugar 

2/3 cup brown sugar 

2 eggs 

1 tsp vanilla extract 

2 cups flour 

1 tsp salt 

1 tsp cream of tartar 

1 tsp bicarbonate of soda 

1 cup semisweet chocolate chips 

1 cup peanut butter chips. 

Peanut butter frosting: 

1 cup unsalted butter

1/2 cup creamy peanut butter

3 cups icing sugar

pinch of salt 

1-2 tbsp milk or cream 

Toppings: 

1 cup marshmallow cream or fluff 

3 tbsp mini chocolate chips 

1/2 cup mini marshmallows 

2 tbsp peanut butter chops 

15 mini peanut butter cups, halved 

1/2 cup prepared caramel sauce, vanilla ice cream.

Method: 

1. preheat oven at 180 degrees c. 

cookie: 

1. in large bowl, beat the sugar and butter until fluffy and light. add in the eggs and vanilla extract and beat again until all combined.
2. in a separate bowl, whisk together the flour, salt, bicarb of soda and cream or tartar. pour mixture in the butter mixture and mix until a thick batter forms. add chocolate and mix.
3. pour the batter into the prepared pan and spread evenly with a spatula. bake for 20-25 minutes or until it comes out clean when poked with a toothpick

frosting: 

1. combine the butter and peanut butter in a large bowl, beat until blended add in the icing sugar and salt and beat until incorporated. mixture will be crumbly so add the milk until the mixture is light and fluffy.
2. frost the sides of the cake and transfer the remaining frosting into a piping bag fitted with a large star tip. pipe large swirls of frosting around the top edge of the cookie. 

finish: 

1. spray a small bowl with cooking spray and place one cup of marshmallow fluff in a bowl, gently heat, pour into the centre of the cookie, spread evenly over the top. 
2. sprinkle marshmallows, chips and peanut butter cup halved over marshmallow cream. top with caramel sauce and serve with ice cream