Cheddar Soup

• 1 bottle beer (light)
• 950 ml beef broth
• 220 gr vermont cheddar (white)
• 220 gr york cheddar orange (new)
• 65 gr carrots (finely diced)
• 50 gr celery (finely diced)
• 45 gr leeks (finely diced white)
• 34 gr butter (unsalted)
• 32 gr all purpose flour