Jimmy heads to Paris to find out why baguettes go stale so fast. Matt checks out buffalo mozzarella in Italy. And Briony May Williams discovers the surprising secret to how mushy peas get mushed.

A trip to California reveals the secret of perfect walnuts. Plus, what makes sour sweets sour? And how do brewers make their trendy hazy beers cloudy?

How can there be so many tomatoes in a tomato ketchup bottle? When did oysters go from Victorian bar snack to luxury food? And the truth about medium vs large eggs.