Ravioli with Balsamic Brown Butter

From Giada De Laurentis via Food Network. This was really yummy the first time I made it and then not as yummy when I made it for dinner group. Maybe because I pushed my luck by using some whole-wheat ravioli? I don't know, but it's quite good when done well! Also, we're not huge nut people, but really liked the addition of the toasted walnuts to this. It adds a ton.

Ingredients:
18 to 20 ounces store-bought ravioli (cheese, mushroom, or squash)
6 tablespoons unsalted butter
2 tablespoons balsamic vinegar
1/2 teaspoon salt
1/4 teaspoon freshly ground black pepper
1/3 cup toasted, chopped walnuts
1/4 cup grated Parmesan

Directions:
1. Bring a large pot of salted water to a boil over high heat.
2. Add the ravioli and cook 4 to 5 minutes, until tender but still firm to the bite, stirring occasionally. (I like mine soft, not firm.)
3. Drain ravioli onto a large serving platter.
4. Meanwhile, in a medium saucepan cook the butter over medium heat, stirring occasionally.
5. When the foam subsides, and the butter begins to turn a golden brown, about 3 minutes, turn off the heat.
6. Let cool for about 1 minute.
7. Stir in the balsamic vinegar, salt, and pepper.
8. Transfer the ravioli to the saucepan with the balsamic brown butter.
9. Sprinkle walnuts and Parmesan over the top. Serve immediately.