Explain in detail the principle of the homescale vanilla ice cream processing using the 200ml of heavy whipping cream, 400ml cold condensed milk and 1 teaspoon vanilla extract.

To make homemade vanilla ice cream using the ingredients you listed, follow these steps:

1. In a mixing bowl, pour 200ml of heavy whipping cream. Make sure the cream is cold as it will whip better.

2. Using an electric mixer or a whisk, whip the heavy cream until stiff peaks form. Stiff peaks mean that when you lift the whisk, the cream stands up straight without collapsing.

3. In a separate bowl, pour in the 400ml of cold condensed milk. Condensed milk will give the ice cream its creamy texture and sweetness.

4. Add 1 teaspoon of vanilla extract to the condensed milk. The vanilla extract will give the ice cream its classic vanilla flavor.

5. Gently fold the whipped cream into the condensed milk mixture. Use a spatula to gently mix the two together, being careful not to deflate the whipped cream.

6. Transfer the mixture into a container suitable for freezing, such as a metal loaf pan or a Tupperware container.

7. Cover the container with plastic wrap or a lid and freeze for at least 4-6 hours, or until the ice cream is firm.

8. Before serving, let the ice cream sit at room temperature for a few minutes to soften slightly for easier scooping.

This homemade vanilla ice cream is rich, creamy, and full of flavor. Feel free to add mix-ins like chocolate chips, nuts, or fruit to customize your ice cream. Enjoy!