Clean mushrooms by wiping them with a damp paper towel or brushing off dirt
Trim off dry or tough stem ends if needed
Slice, quarter, or leave whole depending on the recipe
Heat a pan over medium to medium-high heat
Add butter, oil, or both
Add mushrooms in a single layer
Avoid overcrowding the pan
Cook without stirring for a few minutes to let them brown
Stir occasionally until they release moisture and it evaporates
Season with salt and pepper
Add garlic, herbs, or onions if desired
Cook until tender and golden brown
Serve immediately or use in your recipe