01 - Heat vegetable broth in a saucepan and maintain at a low simmer.
02 - Melt 2 tablespoons butter with olive oil in a large skillet or Dutch oven over medium heat, then cook the chopped onion until translucent, about 3 to 4 minutes. Add garlic and cook for 1 minute until fragrant.
03 - Stir in Arborio rice and cook, stirring constantly, until grains are lightly toasted and edges become translucent, approximately 2 minutes.
04 - Pour in dry white wine and stir continuously until it is mostly absorbed by the rice.
05 - Add warm vegetable broth in increments of ½ cup, stirring frequently. Allow most liquid to absorb before adding the next portion. Continue until rice reaches an al dente creamy texture, about 18 to 20 minutes.
06 - Remove from heat, then stir in grated Parmesan and the remaining 2 tablespoons butter until fully incorporated and creamy. Season to taste with salt and freshly ground black pepper.
07 - Plate immediately, garnishing with chopped parsley and additional Parmesan if desired.