Delicious Shortbread Cookies That Melt in Your Mouth

Directions:
Could you please provide the text that you would like me to simplify? **Make the dough:**
– In a big bowl, mix the softened butter and powdered sugar until they are light and fluffy. If you want, you can add vanilla extract and mix everything together.
– Mix the flour, cornstarch, and salt together, then slowly combine it with the butter mixture. Mix until the dough is soft.

2. Simplify the text. **Form the cookies:**
– Split the dough into two parts and shape each part into a log that is around 2 inches thick.
– Cover each piece of wood with plastic wrap and put it in the fridge for at least 1 hour (this makes it easier to cut and stops it from spreading).