Preheat the oven to 350 degrees.
Combine heavy cream, milk, and eggs in a large bowl and whisk until fully combined.
Whisk in nutmeg, white pepper, and salt. Then fold in half of both the white cheddar and Swiss cheese, and set aside.
While noodles are still warm, add 2 Tablespoons of butter and allow it to melt and coat the pasta.
Use 1 Tablespoon of butter to coat a 9x13” pan.
You are going to layer the noodle and custard mixture. Start by layer half of the cooked pasta in the 9x13” pan, then add half of custard mixture, repeat the process one more time.
Top the Nudel Gratin with the rest of the cheese.
Bake for 45-50 minutes, until the top, is golden brown.
Allow to cool for 10 minutes, then slice into squares.