Instant Pot Risotto - Marie Saba

Ingredients

• 2 Tablespoons (28 g) unsalted butter
• 2 Tablespoons (30 mL) olive oil
• 1 cup (170 g) chopped onion
• 2 cups (200 g) sliced mushrooms
• 1 1/2 cups (300 g) Arborio rice
• 1/2 cup (113 g) dry white wine (optional)
• 4 cups (960 ml) broth or stock
• 1/2 teaspoon (2.5 g) salt
• Freshly ground black pepper
• 1 sprig rosemary
• 3/4 cup (60 g) grated Parmesan cheese, plus more for topping