M'ltesers are a spherical malt honeycomb centre, surrounded by milk chocolate. They are most popular in the United Kingdom, Ireland and Japan. M'ltesers' are 'the lighter way to enjoy chocolate'. M'ltesers, originally known as Energy Balls, were invented by Forrest Mars Sr. in 1936. The current name is a portmanteau of the words "malt" and "teasers". Despite the spelling, there is no connection with the nation of Malta or Maltese people. The mystery of how the chocolate covers the porous biscuit centre is a closely guarded secret.