Homemade Mayonnaise

Ingredients:

¼ cup sugar
1 tsp flour
1 tsp dry mustard
½ tsp salt
¼ cup water
¼ cup vinegar
2 eggs, beaten
1 Tbsp butter

Directions: 

Combine sugar, flour, dry mustard and salt in saucepan. Gradually stir in water, vinegar, beaten eggs, butter and cook over medium heat to a boil beating constantly. Cover and chill.

Or for a more tart flavor use this recipe

Mayonnaise

4 fresh egg yolks
½ tsp salt
1/8 tsp black pepper
1 tsp dry mustard
1 Tbsp wine vinegar or balsamic
2 cups fine olive oil

Beat yolks with salt, pepper and mustard. Add a few drops vinegar; beat smoothly. Add oil drop by drop, mixing well all the time. Add few drops vinegar; then alternate oil and vinegar until all is added and beaten smoothly together. Use at once. If stored in refrigerator, beat gently before serving. Makes 2 ½ to 3 cups.

Source:  Granny's Favorites Cookbooks