Process
egg
,
white wine vinegar
,
Dijon mustard
,
salt
, and
sugar
in
food processor
until combined, about 5 seconds. With processor running, slowly drizzle in
vegetable oil
until emulsified and mixture is thick, about 2 minutes. Scrape down sides of bowl with
rubber spatula
and continue to process 5 seconds longer. Transfer to
airtight container
and refrigerate until ready to use. (Mayonnaise can be refrigerated for up to 1 week.)
egg: 1 large,
white wine vinegar: 4 tsp,
Dijon mustard: 1/2 tsp,
salt: 3/4 tsp,
sugar: 1/4 tsp,
vegetable oil: 1.5 c