Try this Lemon Pie recipe, or contribute your own.
Swapping bottled lemon juice for freshly squeezed changes the structural integrity of the filling. Bottled juice contains preservatives that maintain a uniform acidity, whereas fresh juice varies in pH level, altering how quickly the milk proteins coagulate. Pouring sweetened condensed milk into citrus juice triggers an immediate acid-base reaction. Casein proteins in the milk denature and tangle, causing the liquid to thicken without the application of heat.
Chilling the dessert for at least four hours allows the starches in the crust to absorb moisture from the filling, turning a crumbly base into a firm foundation. Store leftover pie in an airtight container in the refrigerator for up to three days. Cover the exposed surface directly with plastic wrap to prevent a rubbery skin from forming over the custard. Cold temperatures dull sweetness, so let individual slices temper at room temperature for ten minutes before serving.
A standard nine-inch metal pie pan conducts cold faster than ceramic alternatives, speeding up the setting process in crowded refrigerator shelves. Use a sharp utility knife dipped in hot water and wiped dry between cuts to portion clean wedges. Plastic wrap must make direct contact with the filling to block refrigerator odors from penetrating the dairy fats.