A traditional custard native to Mexico, drizzled with caramelized sugar
Thermal control is the singular variable that determines whether baked custard emerges silky or porous. Sugar liquefies and browns between 320°F and 350°F; exceeding this threshold converts the syrup from amber to acrid carbon instantly. Pouring the hot caramel directly into a cold 9-inch round metal pan causes immediate hardening, which shatters the sugar layer prematurely. This crystallization is normal and resolves once the liquid dairy mixture is added and thermal transfer resumes inside the oven. Employing a water bath surrounds the custard container with gentle, ambient steam, buffering the delicate proteins in the eight eggs against direct conductive heat from the metal. Blend the evaporated milk, condensed milk, eggs, salt, and vanilla thoroughly to incorporate air uniformly, then strain the mixture through a fine-mesh sieve if a completely glass-smooth mouthfeel is preferred. Baking takes between 60 and 90 minutes at 350°F, monitored until a wooden pick inserted into the center emerges clean without wet batter clinging to the wood. Chilling the set dessert for at least four hours firms the structure sufficiently for inversion onto a rimmed serving plate. Leftovers keep under refrigeration for up to five days, though freezing is discouraged because emulsion breakdown ruins the texture upon thawing.