Glazing pastry dough adds shine and colour to baked pastry, and a glaze can also be used to seal a pastry shell if a moist filling is being used. The most common glaze to use on savoury pastry is a whole egg beaten with a pinch of salt and brushed on just before baking. Egg yolk beaten with 2 teaspoons water gives a slightly less shiny but even more golden colour to the baked pastry. Milk or single cream can also be used for a lighter glaze.
Apply the glaze before scoring or slashing the top crust so it does not soak into fillings or seal openings or edges. Egg glaze can also be used to secure pastry decorations in position.