In a large bowl or the bowl of a stand mixer, add butter, cream cheese, sugar, lemon zest and vanilla extract.
6 Tablespoons (85g)unsalted butter, at room temperature, 2 ounces (57g) cream cheese, at room temperature, ½ cup (100g) white granulated or castor sugar, ½ teaspoon vanilla extract, 2 teaspoons lemon zest
Beat together for 1 minute on low speed until combined (use the paddle attachment) Do not overmix.
In a separate bowl, blend the flour and salt together. Then, gradually incorporate it into the butter mixture while the mixer is running at a low speed.
1 ⅓ cup (170g) all purpose flour, ¼ teaspoon salt
Mix on low speed for about 30 seconds to 1 minute, and observe the dough mixing. When it starts to come together and the dough clumps around the paddle attachment, it should be the right texture.
Gather the dough and press it down slightly on a sheet of parchment paper.
Cover it with another sheet of parchment. Roll the dough out to a thickness of ¼ inch (6mm) between the two pieces of parchment paper.
Then, place it as is on a baking sheet and either refrigerate (45 minutes)or freeze (30 minutes)
Use a round cookie cutter, about 2 ¼ inches (6cm) in diameter, to cut out the cookies. Re-roll leftover dough and repeat. If the dough gets too soft to work with, place in the fridge or freezer to firm up again.
Place cut out dough on a parchment paper-lined baking sheet.