Dough can be made and formed into balls and frozen in a tightly sealed container for up to 3 months. Biscuits can be baked directly from the freezer for a great party snack.
Preheat a convection oven to 300 degrees F and line 2 baking sheets with parchment paper.
Sift the flour and 1 teaspoon salt in a large bowl.
Beat the butter and sugar together in a stand mixer on medium-high speed until light and fluffy, about 8 minutes. Add the Parmesan, thyme, zest, and 2 teaspoons pepper and continue mixing until evenly incorporated, about 2 more minutes. Add the flour mixture to the butter mixture just to combine.
Form into balls, small (1/4-ounce) or large (3/4-ounce), and place 1 inch apart on the prepared baking sheets. Bake until lightly golden on the bottoms, about 15 minutes.
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