There’s always new stuff being added to this timeline – but you need to look for it in the relevant decade. Some of the latest entries are:
1975: The Savoury Slice is invented in Murray Bridge
1834: Edward Henty is Victoria’s first farmer
1963: Bertie Beetle launched by Hoadley’s
1936: Seafood cocktail recipe published in Adelaide
1929: First Australian mention of avocado on toast 
1933: Brockhoff’s Chocolate Ripple biscuits make Chocolate Ripple Cake