Preheat oven to 400.
Using a bread knife, slice the loaf in half down the center.
In a bowl, mix butter (butter should be soft enough to stir. If not, microwave for 5-10 seconds. It should be loose enough to stir/spread, but not completely melted), olive oil, garlic, parmesan, parsley, and salt until combined. Spread mixture evenly onto two half loaves.
Place loaves onto a baking sheet and bake on the middle rack in oven for 15 minutes until top of loaf is golden and toasty and bread is crusty. When cool enough to touch, slice and serve.