One cause of burnt crust is cooking the pizza at too high a temperature. Try reducing the temperature of your oven and increasing the cooking time to ensure the pizza is fully cooked without burning the crust. Another cause of burnt crust is leaving the pizza in the oven too long. Keep a close eye on the pizza while it's cooking, and remove it from the oven as soon as the crust is golden brown and the toppings are cooked to your liking. A pizza stone can help distribute heat evenly and prevent the crust from burning.