Start by preheating your oven to 350ºF. This ensures that your dish cooks evenly. While it's heating, lightly spray a 9×13-inch baking pan with cooking spray and set it aside. This will prevent your mac and cheese from sticking.
In a large mixing bowl, whisk together the eggs and buttermilk. Make sure they are well combined; this mixture will help create a rich base for your dish.
Add in the melted butter, cheddar cheese, and a pinch of salt and pepper. Stir everything together until the cheese is evenly distributed throughout the mixture. The melted butter adds a wonderful depth to the flavor.
Next, add the cooked and drained elbow macaroni to the bowl. Carefully stir, ensuring that all the pasta is coated with that delicious, creamy mixture. You should see the cheddar cheese clinging to the pasta.
Pour the entire mixture into your prepared baking dish, spreading it out evenly. Make sure there are no dry patches of pasta showing. This will ensure even cooking and a creamy texture throughout.
Now it’s time to bake! Place the pan in the oven and allow it to bake uncovered for 45 to 50 minutes. You’ll know it’s done when the top is golden brown and bubbling.