Anzac biscuits are a sweet, oaty biscuit popular in Australia and New Zealand, traditionally made with rolled oats, flour, sugar, butter, golden syrup, and baking soda. They are historically linked to Anzac Day, which commemorates Australian and New Zealand soldiers, though modern versions were not sent to soldiers in the field during World War I. The biscuits are known for their crunchy or chewy texture, which can be varied by adjusting the ingredients.