Step 1

Preheat oven to 375 degrees. Cook bacon in a 10-inch cast iron skillet until crisp. Remove it with a slotted spoon and set aside.

Step 2

Drain off all but 2 tablespoons of bacon grease. Add onion to skillet and cook until soft, about 5 minutes.

Step 3

Stir in flour and cook for 2 minutes. Gradually whisk in milk. Stir in salt, pepper, thyme, nutmeg, cayenne pepper, and bourbon.

Step 4

Simmer for about 3 minutes, or until slightly thickened. Reduce heat to low and gradually whisk in Gouda cheese and 2 cups of cheddar cheese.

Step 5

Stir in cooked pasta and half of bacon. Sprinkle remaining bacon and cheddar cheese on top.Bake for 15 to 18 minutes.