Chocolate Cookies

Ingredients: 

1 packet digestive biscuits 
1 tbsp. cocoa powder 
1 tbsp. walnuts crushed 
1/2 tin condensed milk 
1 tsp. cornflour 
1 tbsp. butter, softened 
4-5 drops vanilla essence 
1/2 cup milk 
1/2 cup coconut fine white flakes