Can I use regular cheddar instead of Pecorino Romano?
Pecorino Romano has a sharper, saltier flavor essential to authentic carbonara. Parmesan is a closer substitute, but cheddar will significantly alter the taste and won't emulsify the same way.
Why is my carbonara sauce scrambled instead of creamy?
The eggs scrambled because the pasta was too hot or added too quickly. Temper the eggs by slowly adding hot pasta water to the egg mixture while whisking, then toss with the warm (not boiling) pasta off heat.
Can I make carbonara ahead of time?
Carbonara is best served immediately after tossing. It does not reheat well since the sauce will break. Prepare bacon and grate cheese ahead, but cook and assemble fresh to order.
Is guanciale really necessary or can bacon work?
Guanciale is traditional, but bacon is an accessible substitute that delivers similar richness and crispness. This recipe uses bacon for availability without compromising the dish's integrity.
How much pasta water should I reserve?
Reserve 1 to 1.5 cups of starchy pasta cooking water before draining. Start with ½ cup when tempering eggs and add more gradually until the sauce reaches a silky, pourable consistency.