Preheat oven to 180°C.

Mix melted butter, bake mix and water.

Grease and flour a 7 inch (18cm) dia. baking pan and pour batter in.

Bake at 180°C for 30 minutes until a toothpick, inserted in the centre, comes out clean.

Leave to cool for 15 minutes and place cake on serving plate. Spread peanut butter and cut as per choice. Serve