Cook the pasta according to the instructions on the package. Save some of the pasta water for the end, if you desire a more saucy sauce.
Melt butter in a sauce pan.
Add the flour and stir until grainy and cooked through.
Peel and mince the garlic and add to the sauce pan, let cook for about a minute, make sure you don’t burn the garlic.
Add the milk and whisk vigorously to avoid lumps.
Add salt and pepper and let cook together. Be careful so it doesn’t boil over.
Cook until sauce has thickened, about five minutes.
Take this time to shred your cheddar cheese and dice the blue cheese.
Add the shredded cheese and blue cheese, keep stirring until the cheese is melted. If the sauce seems too thick, add some of the pasta water and stir again.
Serve in a bowl over pasta and sprinkle more shredded cheese on top, if desire.
Notes
For just a hint of blue cheese sharpness, mix in equal amounts 100 grams each of blue cheese and creme cheese