Bottled lemon juice has a strict acidity level that it consistently hits, usually about 4.5%, according to FDA regulations. With fresh lemon juice, however, things are less easy to predict, which ...

Add the lemon juice and lemon zest and whisk to combine. Whisk in the flour until smooth and blended, with no traces of raw flour in the mixture. Pour the filling over the warm crust.

For the Lemon Cheesecake Filling: 3 (8-oz.) packages cream cheese, at room temperature. 1/2 c. granulated sugar. 1/4 c. powdered sugar. 2 tbsp. fresh lemon juice. 1 tbsp. finely grated lemon zest ...