Pat the steak bites dry with a paper towel and season with salt and pepper.Heat 1 tablespoon olive oil in a hot skillet until just smoking.
Place steak tips in hot skillet and cook over medium-high heat for 6 minutes, until a rich brown color all over. Transfer steak tips to a platter and tent loosely with foil.
Remove skillet from heat and add the bourbon, maple syrup, and cider vinegar.
Return the skillet to the heat and cook for 2-3 minutes, or until sauce is slightly thickened. Scrape any browned bits from the bottom of the skillet while the sauce is cooking.
Remove the sauce from the heat and whisk in the butter and season to taste.
Return steak pieces and any accumulated juices to skillet and toss to coat. Sprinkle with chopped chives to garnish.
Remove the sauce from the heat and whisk in the butter and chili pepper flakes (if using). Season with salt and pepper to taste.
Notes
Use a sugar free maple syrup such as Lankato for zero carbs and to make this recipe keto friendly.