1, materials:1 egg yolk, 250 ml of vegetable oil, salt 0.5 grams, 25 grams of white vinegar.

2. Prepare the ingredients and put the egg yolk into a container without oil and water.

3, mix the egg yolks with sugar and salt, then add a small spoon of vegetable oil.

4: Slowly add the oil until the whisk is full of egg yolk curds.

5, then add a little bit of white vinegar, after adding white vinegar, the salad dressing will become thin. And with the oil, the dressing will thicken.

6, so so, has been added to the oil over two-thirds of the time, you can add a little more oil. It's about three or four tablespoons.

7, repeatedly add oil and vinegar, until the oil and vinegar are added.

8, the made salad dressing can be put into a bottle and sealed. Eat it within three or four days in the refrigerator.

9, refrigerated overnight the sauce will be more thick.