The crust wins by drying. Although a rabbit-shaped cake begins as one batter, its exterior loses water faster than its center, allowing the surface temperature to climb and browning reactions to accelerate. The difference is geography. Against the heated pan and exposed to oven air, the outer batter encounters conditions that the sheltered middle never quite shares.
Water keeps the middle restrained. Because evaporation consumes energy and the center receives heat more slowly, its moist batter stays cooler than the drying exterior, generally remaining below water's boiling point during baking. Pale does not mean raw. Starch gelatinization and protein denaturation turn the liquid mixture into a supporting structure, while gases from leavening and expanding air create the pores that make the crumb tender. Browning demands different conditions. At the drier surface, the Maillard reaction between reducing sugars and amino compounds produces brown pigments and roasted aromas.
The rabbit's ears are vulnerable. Since narrow projections have more surface area relative to their volume and shorter distances for heat to travel, they tend to bake and dry faster than the thicker body. Shape changes the schedule. Pan material, batter depth and oven conditions influence how strongly this contrast develops, so a golden ear alone cannot establish whether the deepest section has set. Cooling changes the bite. As heat escapes and moisture redistributes, the crust may soften, leaving the rabbit's golden outline as a record of an unequal journey through the oven.
