Creamy Broccoli Cauliflower Soup With Blue Cheese

INGREDIENTS

• 4 tablespoons butter
• 1 large shallot, chopped
• 1/4 cup flour
• 5 1/2 cups vegetable broth or 5 1/2 cups chicken broth
• 1 large potato, peeled and diced small
• 1 bunch broccoli, stems removed and broken into flowerets
• 1 head cauliflower, broken into flowerets
• 1/8-1/4 teaspoon red pepper flakes
• 1/4 teaspoon white pepper
• 1/8 teaspoon paprika
• 1/8 teaspoon salt (or more)
• 6 ounces crumbled blue cheese
• 1/2 cup shredded mild cheddar cheese (or American) (optional)
• 1/2 cup milk or 1/2 cup half-and-half