Chicago-style cheesecake

Name: Chicago-style cheesecake
Prep time: 45 min
Cook time: 1 h 20 min
Total time: 2 h 5 min
Cuisine: American
Ingredients: Ingredients : (for 6" cake pan); 64g unsalted butter, softened and cut into chunks; 20g icing sugar; 1/8 tsp vanilla extract; 64g all-purpose flour; pinch of salt; 500g cream cheese, softened; 100g granulated sugar; 2 tbsp lemon zest; 3/4 tbsp all-purpose flour; 1/8 tsp salt; 1/3 cup buttermilk (original recipe call for sour cream); 3/4 tsp vanilla extract; 1 medium egg yolk; 2 medium eggs