>> source: https://lifehacker.com/your-onion-dip-needs-at-least-five-onions-1849586590

Chop @white onion{1}, @red onion{1}, and @sweet onion{1} into 1/4 inch pieces, and slice the @shallot{2} into thin rings. Separate the dark green part from the rest of the scallions and set aside, then thinly slice the white and light green portion. Add all onions except the dark green scallions to a #large pan{} with the @vegetable oil{1/2%cup}, and season with the @salt{1%Tbsp}. Stir, then set over medium-low heat.

Once the onions begin to sweat and soften, lower the heat as low as it will go and cook until they caramelize and reduce into a jammy, dark brown mass, at least ~{1%hour}. Scrape into a #bowl{} and let cool completely. (I usually cook the onions the night before I want dip so they can cool completely in the fridge.)

Mix the onions with @sour cream{1%cup}, @mayonnaise{2%Tbsp}, @Worcestershire sauce{1/2%tsp}, and @white pepper{1/4%tsp}, taste (with a chip), and adjust salt and pepper if needed. You can even add a pinch of MSG if you like, but this is one dip that frankly does not need it, as the mixture of onions is packed with tons of deep umami. Garnish with the thinly sliced portion of the green onion (or crunchy fried onions, or fried garlic) and consume with your favorite potato chip.