01 -
In a small bowl, combine all the cowboy butter ingredients: softened butter, chopped parsley, minced garlic, lemon juice, dijon mustard, Worcestershire sauce, dried thyme, paprika, onion powder, black pepper, red pepper flakes, and salt. Mix until thoroughly combined. (Alternatively, prepare the cowboy butter ahead of time according to its recipe instructions.)
02 -
Clean the white button mushrooms by gently wiping them with a damp paper towel or mushroom brush to remove any dirt. Avoid soaking mushrooms in water as they absorb moisture easily. For larger mushrooms, you can quarter them, or leave smaller ones whole.
03 -
Heat a large skillet over medium heat. Add the cowboy butter to the skillet and allow it to melt completely. Once melted, add all the cleaned mushrooms to the skillet and stir to coat them evenly in the flavorful butter.
04 -
Cook the mushrooms, stirring occasionally, for approximately 20-22 minutes. As they cook, the mushrooms will release their moisture and then begin to caramelize, developing a beautiful golden color and concentrating their flavor. They're done when they're tender throughout and have a rich golden-brown appearance.
05 -
Taste and add additional salt if needed. Transfer the mushrooms to a serving dish, making sure to spoon any remaining butter and juices from the pan over them. Serve hot as a side dish, appetizer, or as a topping for steaks and other grilled meats.