1 cup unsalted butter at room temperature
3/4 cup superfine sugar
1/2 tsp fine salt
2 1/2 cups all-purpose flour, sifted❗ (you may not need all of this)
3 Tbsp coarse sugar (optional, for sprinkling)
❗measure the flour, then sift.
Preheat oven to 300°F (150°C), conventional setting.
Line a couple of cookie sheets with parchment and set aside.
Put the butter, sugar and salt into the bowl of a stand mixer fitted with the paddle attachment and beat on medium speed until soft and creamy (you don't need to beat until really fluffy, as this will make your cookies spread and be too delicate).
The time this takes can vary depending on how soft your butter is, and how strong your mixer is.
While the butter and sugar are creaming (if you have a mixer you can leave alone, that is), sieve the all-purpose flour into a bowl.
Add about 2 cups of the flour to the butter mixture, mixing on low speed to combine.
You're looking for a soft but cohesive mass; not too crumbly but not greasy and squishy either.
If needed, add the last 1/2 cup of the flour a spoonful at a time until you get the right consistency.
When the flour has been added and the dough just comes together, turn it onto a lightly floured surface and knead lightly just until it's smooth.
For cut-out cookies or stamped cookies, roll portions of dough out between two sheets of parchment paper to your desired thickness.
Refrigerate your dough for 15 minutes or so to firm it up.
Remove the top sheet of parchment and either cut out or stamp cookies.
If you're finding the dough is too soft to cut clean shapes, refrigerate it for 15 minutes before cutting.
Place cut out shapes on lined trays, leaving 1/2 inch (1.5 cm) between each cookie.
If you want traditional Danish-style butter cookies, brush a little egg wash or water on the cookies and sprinkle with coarse sugar crystals.
Bake the butter cookies until firm to the touch and just beginning to color at the edges.
This can take anywhere from 15-25 minutes, depending on their size.
Cool the cookies on the baking trays for 5 minutes, then transfer to a cooling rack.
When completely cool, store in an airtight container.
If you haven't sprinkled them with sugar, these cookies can be decorated with royal icing or fondant.