Making Chocolate Bubble Cakes

Today the Arrow's maths group made Chocolate Bubble Cakes. We had a Master Chef bake off competition (boys against girls). We even had judges. Paddy and Kerry judged the crackles and the girls won! But we had to also take into account the tidiness of the groups while they were cooking and the boys won that. We decided it had to be a draw! They were certainly very yummy! The teachers enjoyed theirs as well.
Here is the recipe:

Chocolate Bubble Cakes

250 g vegetable shortening
100 g icing sugar
25 grams cocoa
100 grams rice bubbles
100 grams coconut

1. Put vegetable shortening in a saucepan.
2. Cook over a low heat until melted.
3. Sift icing sugar and cocoa together.
4. Add sifted ingredients, rice bubbles and coconut to saucepan, stirring until well combined.
5. Spoon mixture evenly into paper patty cases.
6. Chill until firm.

How many cakes did you make?
What is the mass of each cake?
What is the mass of coconut in each cake?
If I wanted to make 100 patty cakes how much cocoa would I need?