If you are using store-bought crust, set it out to warm up a bit before rolling. For homemade pie crust, make the crust about 30 minutes in advance and let it rest in the fridge. Either way, you want a firm dough that is not too cold, and also not room temperature.
Pre-heat the oven to 375°F.
Whisk eggs, milk, salt, and pepper. Add shredded cheese and crumbled bacon.
For a bite-sized mini quiche, use a 24-count mini muffin tin and cut the crusts to about a 2" diameter. If you're using a 12-count muffin tin, cut the crusts into 3.5" rounds.
Place dough circles in mini or regular muffin tin, fill with egg mixture.
Cook in preheated oven until the crust is golden and the filling is set, about 25 minutes for mini quiches, and 28 minutes for the regular muffin size quiches.
Repeat with remaining dough and filling as needed.
Let cool, remove from tin, arrange on platter, and serve warm.
