Can I use another kind of fat instead of coconut fat? If yes, which one can be used? Thanks!

You're welcome! Glad I could help.

Thank you so much for your answer, PetitBleu! I had no idea of the differences between coconut fat/lard/shortening and butter. Living and learning.

You could use chilled vegetable shortening or even lard if you wanted. The shortening (which is 0% water, 100% fat--same as coconut oil) makes the crust nice and flaky, while the butter (about 15% water) imparts an excellent flavor and produces a tender crust.