Ingredients:
2 large yellow onions
4Tbsp unsalted butter
1/4 c. vegetable oil
1/4 tsp. ground cayenne pepper
1 tsp kosher salt
1/2 tsp freshly ground black pepper
4 oz. cream cheese, room temperature
1/2 c. sour cream
1/2 c. good mayonnaise
Method:
Cut the onions in half, and then slice them into 1/8-inch-thick half-rounds. (You will have about 3 cups of onions.)
Heat the butter and oil in a large saute pan on medium heat. Add the onions, cayenne, salt, and pepper and saute for 10 minutes. Reduce the head to medium-low and cook, stirring occasionally, for 20 more minutes, until the onions are browned and caramelized. Allow the onions to cool.
Place the cream cheese, sour cream, and mayo in the bowl of an electric mixer fitted with a paddle attachment and beat until smooth. Add the onions and mix well. Taste for seasonings. Serve at room temperature.