Preheat oven to 220 degrees Celcius (425 degrees Fahrenheit).
Mix the flour, baking powder and salt into a large bowl.
Add the butter and mix with a fork or a pastry cutter until the mixture resembles fine granules.
Add the sugar and cinnamon, and mix them thoroughly into the mixture.
Add the milk/cream and vanilla and stir them in with a fork until a nice, thick dough forms.
Roll the dough out about 1/2 in thickness.
Cut out 3-inch squares and transfer the dough to a cookie sheet.
Criss-cross (DO NOT cut all the way) each square from corner-to-corner with a knife.
Bake for about 12 minutes or more (depending on the thickness of the bread) until it is set and lightly golden. Based on the passage above, What should I use to mix the butter with the flour, baking powder, and salt?
This prompt doesn't seem malicious.