Hot water crust is a type of pastry

Pastry

Pastry is the name given to various kinds of baked products made from ingredients such as flour, sugar, milk, butter, shortening, baking powder and/or eggs. Small cakes, tarts and other sweet baked products are called "pastries."...

 used for savoury pie

Pie

A pie is a baked dish which is usually made of a pastry dough casing that covers or completely contains a filling of various sweet or savoury ingredients....

s, such as pork pie

Pork pie

A pork pie is a traditional British meat pie. It consists of roughly chopped pork and pork jelly sealed in a hot water crust pastry . It is normally eaten cold as a snack or as part of a meal.-Types:...

s, game pie

Game pie

Game pie is a form of meat pie featuring game. The dish dates from Roman times when the main ingredients were wild birds and animals such as partridge, pheasant, deer, and hare. The pies reached their most elaborate form in Victorian England, with complex recipes and specialized moulds and serving...

s and, more rarely, steak and kidney pie

Steak and kidney pie

Steak and kidney pie is a savoury pie that is filled principally with a mixture of diced beef, diced kidney , fried onion, and brown gravy...

s. Hot water crust is traditionally used for making hand-raised pies.

As the name suggests, the pastry is made by heating water, melting the fat in this, bringing to the boil, and finally mixing with the flour. This can be done by beating the flour into the mixture in the pan, or by kneading on a pastry board. Either way, the result is a hot and rather sticky paste that can be used for hand-raising: shaping by hand, sometimes using a dish or bowl as an inner mould. As the crust cools, its shape is largely retained, and it is filled and covered with a crust, ready for baking. Hand-raised hot water crust pastry does not produce a neat and uniform finish, as there will be sagging during the cooking of the filled pie. This is generally accepted as the mark of a hand-made pie. It is possible, however, to bake the pastry in a mould, as with other pies.

When baked, the crust acquires a rich, shiny, golden-brown exterior, which is fairly crisp and water-resistant. This allows the pies to be filled with a savoury jelly

Aspic

Aspic is a dish in which ingredients are set into a gelatin made from a meat stock or consommé. Non-savory dishes, often made with commercial gelatin mixes without stock or consommé, are usually called gelatin salads....

 or gravy

Gravy

Gravy is a sauce made often from the juices that run naturally from meat or vegetables during cooking. In North America the term can refer to a wider variety of sauces and gravy is often thicker than in Britain...

 as they cool, often through a central hole in the crust made expressly for the purpose during raising.

As it contains lard

Lard

Lard is pig fat in both its rendered and unrendered forms. Lard was commonly used in many cuisines as a cooking fat or shortening, or as a spread similar to butter. Its use in contemporary cuisine has diminished because of health concerns posed by its saturated-fat content and its often negative...

, it is unsuitable for vegetarians. Vegetable fat or shortening

Shortening

Shortening is any fat that is solid at room temperature and used to make crumbly pastry. The reason it is called shortening is because it prevents cross-linkage between gluten molecules. Cross linking is what causes doughs to be sticky. Seeing as cake is not meant to be sticky, shortening is used...

 can be substituted in equal measure, but the texture of such a crust will be slightly different (and mouthfeel

Mouthfeel

Mouthfeel is a product's physical and chemical interaction in the mouth, an aspect of food rheology. It is a concept used in many areas related to the testing and evaluating of foodstuffs, such as wine-tasting and rheology. It is evaluated from initial perception on the palate, to first bite,...

will be somewhat lighter) as shortening lacks the "grain" of lard.