how long to cook an onion
How to Saute Onions. In a large skillet or pan heat cooking oil or butter over medium-high heat until hot. Use about 1 tablespoon fat per onion. Add chopped or sliced onions and cook for 5 to 7 minutes or until tender, stirring frequently with a wooden spoon or heatproof spatula. If desired, cook a little longer until edges just start to brown. Remove from heat and use as desired.
In a large skillet melt 2 tablespoons butter over medium-low heat. Add the onions. Cook, covered, for 13 to 15 minutes or until the onions are tender, stirring occasionally. Uncover the skillet and cook and stir over medium-high heat for 3 to 5 minutes more or until onions are golden.