Moist, cinnamon-infused muffins topped with a sweet and crunchy cinnamon-sugar coating.
Moist, cinnamon-infused muffins topped with a sweet and crunchy cinnamon-sugar coating.
Pull the warm muffins from the 350 degrees F oven immediately at the 20-minute mark, because leaving them in longer hardens the crumb and prevents the butter coating from adhering correctly. Testing this formula reveals that treating muffin batter like quick bread requires strict restraint. Overmixing develops the gluten proteins in the all-purpose flour, transforming a tender pastry into a tough, rubbery cylinder. Keeping the batter deliberately lumpy traps carbon dioxide released by the baking powder, ensuring pockets of steam expand the structure properly during baking.
Achieving that distinct sandy crust relies entirely on temperature differentials. Dipping the warm muffin tops first into melted butter and immediately into granulated sugar creates a thermal bond. The fat solidifies against the cooling surface while dissolving the outer layer of sugar crystals into a crisp glaze. Ground cinnamon contains volatile oils that bloom upon contact with the hot butterfat, releasing aromatics that would otherwise dissipate in a dry oven environment.