Combine flour, sugar, and baking powder in the bowl of a food processor.
Pulse a few times to combine.
Slice butter and cream cheese.
Add slices 1 or 2 at a time, pulsing a few times after each addition.
Add vinegar and cream.
Pulse until mixture comes together into a dough.
Lightly form into a ball and place on a piece of plastic wrap.
Flatten slightly and wrap securely.
Place in refrigerator for 30 minutes.
Remove from refrigerator and place on a piece of lightly floured parchment.
Roll dough into a rectangle that is 1/4" thick. Set aside.