INGREDIENTS
5 1/2 tbsp
butter, divided
1 1/3 cups
chopped carrots (about 3)
1 cup
chopped celery (2 stalks)
1 cup
chopped yellow onion (1 small)
2
garlic cloves, minced
3 cups
low-sodium chicken broth
3 1/2 cups
peeled and cubed russet potatoes (cut 1/2-inch to 3/4-inch thick (2 large))
3 cups
chopped broccoli florets (from about 2 heads)
1/4 tsp
dried thyme
Salt and freshly ground black pepper
6 tbsp
all-purpose flour
3 cups
milk (preferably 1% or 2%)
1/2 cup
heavy cream
2 cups
shredded sharp cheddar cheese (8 oz)
1/3 cup
finely shredded parmesan cheese (1 oz)