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Whether they're thick and fluffy or thin and crispy at the edges, every household will have a favourite style of pancake this Shrove Tuesday. But whatever your preference, it's not just a case of mixing flour, eggs and milk and pouring the mixture into a pan. Science tells us that several additions to the batter and a few important preparation tips will get the most delectable results. Adding both an acid and an alkali to your batter is essential if you want fluffy pancakes, while butter will help create a delicious browning reaction – but don't overbeat your batter or the results will be too tough. London experts have already used AI to identify the ultimate pancake recipe that lists seven ingredients – flour, sugar, baking powder, salt, milk, butter and eggs.