Bring a large pot of salted water to a boil and add the pasta. Stir the pasta right away so it doesn't stick together.

Cook the pasta until it is al dente.

Remove 1/2 cup of pasta water from the pot and set aside for later. Strain and set aside. 

Next, add the butter to a large sauce pan over medium/high heat. 

Add garlic and 1/2 teaspoon of salt to the butter and sauté the garlic until it browns. 

Then, add the flour to the butter mixture and whisk the ingredients together until a paste is formed. 

Slowly pour the milk into the pan whisking consistently until the milk thickens (3-4 minutes). 

Turn the heat to low and then add the brie cheese to the milk mixture and stir until the brie cheese is melted and the sauce is thick. 

Add the rest of the salt, pepper, and fresh thyme to the cheese sauce and mix. 

Finally, pour the cooked pasta into the cheese sauce and fold the pasta into the sauce. 

If a thinner sauce is desired add a tablespoon or two of pasta water to the pasta. 

Serve with fresh thyme and enjoy.