Scalloped Potatoes au Gratin Recipe - (4.6/5)

Ingredients

• 1 tablespoon unsalted butter
• 1 yellow onion, finely chopped
• 2 cloves garlic, minced
• 1 1/2 cups heavy cream
• 1/2 cup low-sodium chicken broth
• 2 teaspoons fresh thyme leaves
• 1 1/2 teaspoon kosher salt
• 1/2 teaspoon ground black pepper
• 2 pounds russet potatoes, peeled and sliced into 1/8-inch slices
• 1/2 cup shredded Cheddar
• 1/2 cup shredded gruyere cheese