Ingredients:
1 large egg yolk*
1 1/2 teaspoons fresh lemon juice
1 teaspoon white wine vinegar
1/4 teaspoon Dijon mustard
1/2 teaspoon salt plus more to taste
3/4 cup canola oil, divided
4 teaspoons sugar
Preparations:
1. Combine egg yolk, lemon juice, vinegar, mustard, sugar and 1/2 teaspoon salt in medium bowl. Whisk until blended and bright yellow, about 30 seconds.
2. Using 1/4 teaspoon measure and whisking constantly, add 1/4 cup oil to yolk mixture, a few drops at a time, about 4 minutes. Gradually add remaining 1/2 cup oil in very slow thin stream, whisking constantly, until mayonnaise is thick, about 8 minutes (mayonnaise will be lighter in color). Cover and chill. do ahead Can be made up to 2 days
Source: http://www.epicurious.com/recipes/food/views/Homemade-Mayonnaise-241868#ixzz1zre36fi1