01 - Pat steak cubes dry thoroughly with paper towels and season lightly with salt and black pepper on all sides.
02 - In a medium mixing bowl, blend softened butter, minced garlic, chopped parsley, chives, dill, Dijon mustard, hot sauce, smoked paprika, crushed red pepper flakes, lemon zest, lemon juice, salt, and black pepper until fully incorporated. Reserve at room temperature.
03 - Heat olive oil in a large skillet over medium-high heat. When the oil is shimmering, arrange steak cubes in a single layer; avoid overcrowding. Sear for 2 minutes on each side until dark golden brown. Sear in batches if necessary to maintain high heat.
04 - Reduce heat to medium. Return all steak bites to the skillet. Add the cowboy butter sauce and toss thoroughly to coat. Continue cooking for 1 to 2 minutes, stirring gently, until butter is melted and meat reaches the desired doneness.
05 - Transfer steak bites to a platter and garnish with extra fresh herbs if desired. Serve immediately.