"These slow cooker caramelized onions are unbelievably easy to make, and only require 2 main ingredients!..."
INGREDIENTS
•
3-4 pounds white, yellow or red onions, peeled and thinly sliced
•
3 tablespoons butter (or olive oil), melted
•
salt and pepper
•
optional: 1 tablespoon of brown sugar and 2 teaspoons of balsamic vinegar