Foryoueats: Homemade French Onion Dip

Ingredients

• 3 tbsp butter
• 2 1/2 cups diced onions (2 to 3 onions) (brown, yellow or white)
• 3/4 tsp salt
• 1/2 tsp black pepper
• 1/2 tsp onion powder
• 1/4 tsp cayenne pepper
• 4 oz / 120 g cream cheese (cold), cut into cubes
• 1/4 cup whole egg mayonnaise
• 1/2 cup sour cream (full fat is best, but you can use low fat or even yoghurt)