How do you make pudding without lumps?

1. Use the correct ratio of ingredients. Too much or too little cornstarch will result in lumps.

2. Whisk the cornstarch and sugar together until they are well combined. This will help to prevent the cornstarch from clumping when you add the milk.

3. Slowly whisk the milk into the cornstarch and sugar mixture. Whisking too quickly will cause the cornstarch to clump.

4. Bring the mixture to a boil over medium heat, whisking constantly. This will help to dissolve the cornstarch and prevent lumps from forming.

5. Reduce the heat to low and simmer the mixture for 1-2 minutes, or until it has thickened. Stir constantly to prevent scorching.

6. Remove the mixture from the heat and stir in the flavoring.

7. Pour the pudding into a serving dish and let it cool for a few minutes before serving.