Chocolate Cinnamon Crumb Squares

Wouldn't rave about these but they do stick to yer ribs and they are chocolaty. Need some cream to go with them. Frankly can't taste the cinnamon.

For the crumble topping 

• 50g plain flour 
• 1 tbsp cocoa powder 
• 2 tsp ground cinnamon 
• 50g light muscovado sugar 
• 50g butter

For the cake 

• 200g plain chocolate 
• 175g softened butter 
• 200g light muscovado sugar 
• 3 eggs 
• 175g self-raising flour 

Make the crumble first and set aside. Make the cake (cream butter and sugar, melt chocolate, add, etc.). Pour into 20cm square tin, top with crumble, bake at 150 for 40 mins, until skewer comes out clean. Cool in tin for 10 mins then dust over with icing sugar and cut into squares.