Bring whole eggs to room temperature; separate and place yolks in food processor or mixing bowl
In a 2 cup measuring cup, add 1 cup vegetable oil and ½ cup olive oil; set aside
Add vinegar to eggs and whisk on high for a minute or so
While food processor is on high, drizzle in oils in a steady stream until mixture begins to thicken; once mixture forms a thick, ribbon-like consistency, it's done
Season for salt and pepper (optional)
Video
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Notes
Make sure your eggs are room temperature and your oil is freshAdd the vinegar to the egg yolks and whisk for a few minutes, then drizzle in the oil.