Ingredients:

1 Avocado
1/2 Sour Cream
1 Mayonnaise
1 Lemon Juice
1 Garlic
1/2 Salt
1/4 Ground Pepper

Directions:

Puree the avocado in a blender or food processor with the sour cream, mayonnaise, lemon juice, garlic, salt and pepper.
Place in serving bowl.
This is a tip I found for keeping the dip from darkening.
Spread a layer of sour cream over the top of the avocado dip and seal it to the sides of the serving dish.