Copycat Outback Steakhouse Walkabout Soup Recipe - My Homemade Recipe

Ingredients

• 6 tablespoons butter, divided.
• 2 cups thinly sliced sweet yellow onions.
• 14.5 ounces chicken broth.
• 2 chicken bouillon cubes.
• 1/4 teaspoon black pepper.
• 1/2 teaspoon salt, divided.
• 3 tablespoons all-purpose flour.
• 1 1/2 cups whole milk.
• 1/4 cup Velveeta cheese.
• Shredded cheddar cheese for garnish.
• Dark Russian bread for serving.