01 - Pat steak cubes dry with paper towels and season evenly with salt and black pepper.
02 - In a medium mixing bowl, combine 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. Stir thoroughly until the mixture is fully integrated. Set aside.
03 - Heat olive oil in a large skillet over medium-high heat. Once hot, arrange steak cubes in a single layer and sear for 2 minutes per side, or until browned. If necessary, cook in batches to avoid overcrowding.
04 - Reduce the heat to medium. Return all steak bites to the skillet, then add the prepared cowboy butter sauce. Toss gently to coat the steak evenly. Continue cooking for 1 to 2 minutes, just until the butter is melted and the steak reaches the desired doneness.
05 - Transfer to a serving platter immediately and garnish with additional fresh herbs if desired.