Chocolate Brownie and Coffee Ice Cream Sandwich

# Melt the chocolate with the margarine in a bowl over a pan of boiling water. # Stir in the sugar, milk and vanilla essence, then add the flour. You will have something that is a strange gloopy consistency. # Spread into shallow oblong tin and cook for about 25 minutes at 200°C/400°F until cooked. # Leave it in the tin to cool, then cut into slices. # Place a dollop of coffee ice cream between two fat slices of brownies.