Preheat oven to 375°F. Combine honey, butter, garlic and mustard in a bowl. You might need to mash the butter with a spoon to blend in with the other ingredients.
Place chicken in a shallow baking pan and spread the honey garlic mixture all over the chicken breasts. Season with salt and pepper.
Bake uncovered for 45 minutes or until chicken is cooked thoroughly. Remove from oven and serve hot.