In a stand mixer: add all the ingredients into the mixing bowl, mix with a paddle-shaped attachment over low speed. The dough will be crumbly at first, but will come together as it's mixed. Gather the dough into a smooth ball.
In a food processor: add all the ingredients to the food processor bowl fitted with “S” blade and pulse to combine. The dough will be crumbly at first, but will come together as it's mixed. Gather the dough into a smooth ball.
By hand: on a large chopping board stir the flour with salt and powdered sugar together, put the sour cream, egg yolk, and cold cubed butter on top and chop with a knife until crumble forms. Gather the dough into a smooth ball.
All methods: Divide the dough into 4 parts, shape each part into a flat disc and wrap in plastic foil. Put the dough in the fridge for 40 minutes.