Chocolate Coconut Squares

step 1 Heat oven to 180C/fan 160C/gas 4. Butter and line the base of a 20cm square baking tin. Beat together the butter and sugar until pale and creamy, then beat in the eggs. Add 1 tbsp of the flour if the mix starts to curdle. step 2 Sieve in the flour, baking powder and cocoa and fold in with a metal spoon. Stir in the milk. Scrape mix into the tin and level the top. Bake for 18-20 mins or until the cake springs back when pressed. Allow to cool in the tin. step 3 To make the icing, put the chocolate, butter and 4 tbsp water in a pan and gently heat until melted. Allow to cool slightly, then beat in the icing sugar. step 4 Remove cake from tin and peel away paper. Cut into 16 squares. Dip the squares into the icing, then roll in the coconut. Allow to set on cooling rack.