Rowntree’s launched Aero in the United Kingdom in 1935 with an aerated chocolate centre.
Aero is known for its bubbly interior, created by incorporating gas into chocolate and allowing the structure to set. The bubbles give the bar a lighter texture and make it break differently from a solid chocolate bar.
The product was introduced by Rowntree’s, the British confectionery company that later became part of Nestlé. Aero has been sold in several flavours and formats, but the original identity centres on its aerated chocolate texture.
Aero is sometimes confused with other bubbly bars, including Wispa and regional aerated products. Those brands may use similar technology, but they are separate products with different histories and ownership.