Since filet mignon is just about the most tender cut of beef you can sink your teeth into, a filet mignon marinade is meant more for flavor than creating more tenderness. Some love the flavor of filet mignon by itself, but others feel that it can use a little kick. This Bacon Garlic Herb Butter Marinade for filet mignon is the perfect complement to your beef, with woodsy herb flavors and savory bacon and garlic accents. This recipe helps bring out the natural flavors of one of the most incredible cuts of steak with the added flavors of butter and bacon that pair perfectly with filet mignon. This recipe is best for when you have some extra time to marinate filet mignon for at least an hour or two for the best flavor.