A leading UK chemical engineer has revealed the unlikely ingredient needed to make the perfect sandwich... bubbles. Speaking at an Institution of Chemical Engineers' (IChemE) lecture. Professor Grant Campbell said that bubbles in bread are as important for making a good sandwich as its filling, due to the unique composition of wheat. "Bread is special because of its bubbles. It's got these bubbles because wheat, when mixed with water, salt and yeast is the only cereal that can trap the carbon dioxide and give us raised bread. "That raised bread makes for soft bread and it's soft because of the bubbles. Different breads are distinguished by different aerated structures. It's one of the reasons why brown or whole meal bread is less suitable for making tasty sandwiches - the bran pops the bubbles. "Chemical engineers are working to find a way of getting bran into bread recipes without popping the bubbles. By doing this we will create a healthier bread without sacrificing the tastiness. Nutritionists have been telling us to eat more whole meal bread for decades but we still prefer white bread because it tastes better" explained Campbell.
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