Zesty California Onion Dip By Alton Brown

Source: Good Eats, Alton Brown, Food Network

1 1/2	cups	sour cream
3/4	cups	mayo
2	tbsp	olive oil
1 1/2	cups	onions, diced
1/4 and 1/2	tsp	kosher salt (used on two occasions)
1/4	tsp	white pepper
1/4	tsp	garlic powder

In a mixing bowl, add sour cream and mayo
2 tbsp Olive Oil in medium sized skillet set to medium-low heat
Add onions, and 1/4 tsp salt
Cook for about 20 minutes, until brown
Add onions to sour cream and mayo bowl, being sure to get the oil as well (good flavors there)
Add 1/2 tsp salt, white pepper, and garlic powder
Mix well

Why cook onions for so long? - 1) remove excess moisture, 2) caramelize the sugar in them, 3) create dark color for the dip

Why not black pepper? Because AB thinks it would make the dip look bad.