Plum and chocolate self saucing pudding

Ingredients

• 1 ½ cups SR Flour
• 3 Tbsps cocoa powder
• Pinch salt
• 1/3-cup castor sugar
• 80g butter, melted and cooled
• 20g coconut oil, melted and cooled
• 2 eggs, beaten
• 1 cup full cream milk
• 6 plums, whole
• Sauce:
• 1 cup coconut sugar
• 3 tbsp cocoa powder
• 1 tsp instant coffee
• 1 ½ boiling water