Mayonnaise
["1 c. oil", "1 egg", "2 Tbsp. vinegar or lemon juice", "1/4 tsp. salt", "1/4 tsp. dry mustard"]
["Blend on low speed for 15 seconds, then pour oil in while it is going.", "Beat for 1 minute; scrape, then reblend."]
["oil", "egg", "vinegar", "salt", "dry mustard"]