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Export 3 ingredients for grocery delivery
Step 1
In a large non-stick pan, cook onions, butter, olive oil and brown sugar over medium low heat.
Step 2
Stir frequently until golden and caramelized. (About 45 minutes).
Step 3
Combine sliced onions, butter and salt (no brown sugar required).
Step 4
Stir, cover and cook on low 8-10 hours.