煉乳是一種濃縮的乳製品，通常具有較濃稠的質地和更濃郁的味道。它是透過將牛奶加熱，然後將水份蒸發掉而製成的。製造煉乳的過程大致如下：

牛奶經過過濾和去除雜質，然後加熱至一定溫度（通常在攝氏80至90度之間）。加熱過的牛奶會使其中的水份蒸發，濃縮乳液。接下來，乳液會持續攪拌，以防止其在加熱過程中沉澱或燒焦。當乳液濃縮至適當濃度時，會停止加熱，並冷卻至室溫。最後，煉乳會經過包裝，以便儲存和運輸。煉乳通常用於各種烹飪和烘焙食品中，例如在製作冰淇淋、餡料、甜點、醬料和飲品時，煉乳都是常見的成分。它也可以單獨食用，作為甜品或加入咖啡、茶和烘焙飲品中，以增添濃郁的奶香味。加熱的過程可以透過鍋子或是微波處理，若要口味更濃稠可以在加熱的過程中加入奶油及糖。

Condensed milk is a concentrated dairy product known for its thick texture and rich flavor. It is made by heating milk and evaporating the water content.

The process of making condensed milk typically involves the following steps:

1.Milk is filtered and purified to remove impurities, then heated to a certain temperature (usually between 80 to 90 degrees Celsius).

2.The heated milk causes the water content to evaporate, resulting in the concentration of milk. The milk is continuously stirred during this process to prevent it from settling or burning.

3.When the milk reaches the desired concentration, heating is stopped, and it is cooled to room temperature.

Finally, the condensed milk is packaged for storage and transportation. Condensed milk is commonly used in various cooking and baking recipes, such as in making ice cream, fillings, desserts, sauces, and beverages. It can also be consumed on its own as a dessert or added to coffee, tea, and baked goods to enhance their flavor. The heating process can be done using a pot or microwave, and for a thicker consistency, cream and sugar can be added during heating.

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