- Using a food processor, pulse butter into flour until it resembles crumbs. pulse in sour cream just until a ball forms and it just begins to hold together, being careful not to over-mix.
- Roll out and fold over in three sections (like folding a business letter). Repeat 2-3 times to get the layers of puff pastry.
- Wrap in plastic wrap and refrigerate for a minimum of 30 minutes before using. Let sit for a few minutes or pound with rolling pin to get it pliable.