4	sweet onions, sliced
4 tablespoons	unsalted butter
¼ cup	vegetable oil
½ teaspoon	cayenne pepper
2 teaspoons	kosher salt
1 teaspoon	ground black pepper
8 ounces	cream cheese, room temperature
8 ounces	sour cream
1 cup (208 grams)	mayonnaise

1. Cook onions in butter and oil with cayenne, salt, and pepper until brown and caramelized. Allow to cool completely.
2. Beat cream cheese, sour cream and mayonnaise until smooth.
3. Add onions and mix well.