- 4 tablespoons unsalted butter
- 1 pound yellow onions, peeled and very thinly sliced (4 cups)
- Melt the butter in a large saute pan over medium-high heat. Add the onions and lower the heat to medium-low. Cook slowly, stirring occasionally, until golden brown and caramelized, 45 minutes to 1 hour.
- Remove from the heat and set aside until ready to serve with the Bacon Pancakes.