Alfred Bird's first major invention was egg-free custard in 1837. Alfred Bird used cornflour instead of egg to create an imitation of egg custard. It was originally intended only for his wife Elizabeth who had both egg and yeast allergies. The Birds used genuine custard when entertaining guests, but on one occasion the egg-free custard was (either by accident or design) fed to dinner guests. It was well received, and Alfred Bird realised that his invention had a wider use. Soon afterwards Alfred Bird founded 'Alfred Bird and Sons Ltd', which would go on to become the famous Bird's Custard company and brand.