Liège Waffle (Yeast Dough with Pearl Sugar)

Variations

• It is really a different food from the Brussels waffle. That one pours a thin batter with whipped whites in it, and as its page says the crispness comes from the batter. A Liège waffle is a ball of yeast dough placed by hand, and its crispness comes from caramel on the surface. The chewy waffles sold in Korean cafés are nearly all this one.
• Cinnamon instead of vanilla: a teaspoon in the dough. Common in Liège itself.
• Chocolate: chunks alongside the pearl sugar. Chocolate does not caramelise, so do not cut the pearl sugar to make room for it.
• Overnight cold prove: 8-12 hours in the fridge for the first rise. Deeper flavour, and only the baking left to do in the morning (fermentation basics).
• No pearl sugar: coarsely crushed sugar cubes are the next best thing. The coarseness is the point, so granulated sugar does not make this dish at all.
• Other Belgian dishes here: moules-frites and carbonade flamande.

Tips

• One ingredient behaves two ways, and this page is why. Kanelbulle says of pearl sugar that "it is coarse and hard enough to survive 225°C and stay as grains." The waffle page says that in a Liège waffle the same pearl sugar "melts and caramelises into a hard shell." Both are true. The kanelbulle's sugar sits in oven air; the Liège waffle's is pressed against cast iron. Conduction through metal hands over heat far faster than convection and radiation through air, so a grain that survives eight minutes at 225°C melts in seconds on a 180°C plate. Heat control describes cast iron as slow to heat and slow to cool when you are searing meat; this is what the same property does to sugar.
• So the sugar has to survive twice. First in the dough. A coarse grain has little surface for its volume, so an hour in a wet dough only rounds it off; crushed fine, it dissolves in that time and all you have is sweet dough. That is why it goes in after the second prove and why you do not knead it back in.
• Run the iron cooler than for a Brussels waffle. On the caramel ladder in what sugar does, 170-180°C is amber and above 190°C is bitter and unrecoverable. Sugar that has escaped onto the plate crosses that in seconds — the same guide's "a sweetened glaze cannot sit over high heat for long," at close range.
• Three to four minutes, not five. The dough itself is cooked in three. After that only the caramel goes on developing, and it develops towards bitter.
• Cleaning the plates between waffles is part of the recipe. It is the biggest practical difference from waffle: a thin batter that escapes is still batter, and what escapes here is sugar.
• The irregular shape is not a failure. A stiff dough will not push into the corners of the mould. Force it and the dough tears and more sugar leaks out.
• Stand them on a rack. Flat on a plate a waffle wets its own underside, and the caramel softens with it.