Season the beef steaks with salt, black pepper, and garlic powder.
Melt butter in a large skillet over medium-high heat.
Add the steaks and cook for 4–5 minutes per side until golden brown and cooked through. Remove and set aside.
Reduce heat to medium and pour beef broth into the skillet, scraping up browned bits.
Add heavy cream and bring to a gentle simmer.
Sprinkle in xanthan gum while whisking to thicken the gravy.
Stir in freshly cracked black pepper.
Return the steaks to the skillet and simmer for 2–3 minutes until coated in gravy.