Steps
1. Heat the vegetable broth in a saucepan and keep it warm on low heat.
2. In a separate large pan, melt the butter and olive oil over medium heat.
3. Add the onion and garlic to the pan and sauté until they become translucent.
4. Add the mushrooms and cook until they release their moisture and start to brown.
5. Add the arborio rice to the pan and stir to coat it with the butter and oil.
6. Pour in the white wine and cook until it is absorbed by the rice.
7. Gradually add the warm vegetable broth, about 1/2 cup at a time, stirring constantly until the liquid is absorbed before adding more.
8. Continue adding the broth and stirring until the rice is cooked al dente and has a creamy consistency.
9. Stir in the grated Parmesan cheese and season with salt and pepper to taste.
10. Remove from heat and let it rest for a few minutes before serving.