Preheat the oven to 350 degrees(I use the convection roast setting. You can use the regular setting and bake for additional 10 minutes) Cool the melted truffle butter slightly. Add the tarragon, garlic, salt, and black pepper. Mix together to form a loose paste.
Remove the giblets from the chicken and reserve for another use. Rinse the chicken and pat dry. Place the chicken in your choice of baking or roasting pan.
Using your fingertips, gently loosen the skin on the breast. Try not to break the skin.
Use the tarragon, garlic paste to rub under the skin and all over the chicken, including the inside of the chicken.
Place the baking dish in the preheated oven. Roast the chicken for one hour. Internal temperature should reach 170 degrees.
Remove the chicken from the oven and cover loosely with aluminum foil. Let sit for 15 to 30 minutes before cutting.
Cut up the chicken and serve it with some of the pan drippings and your favorite side dish.