This dough is great for many different applications and you can play around with the sugars to get the desired flavor you are looking for.
You can replace the granulated white sugar with additional brown sugar if you a looking to get a slightly darker crust and deeper caramel flavor.
If you prefer the taste of dark brown sugar over light they are also interchangeable.
Alternatively for an equally delicious Shortbread style crust you can use all white granulated sugar, this would be great if you are not looking for that caramel undertone.
Get in the kitchen, have fun, and experiment!
Stay sweet my friends,