Whisk all dry ingredients together in a medium bowl.
Add butter and mix with either a wooden spoon or mixer until dough is formed and no dry ingredients remain in bottom of bowl.
Press evenly into bottom of prepared pan, using a tamper or bottom of a dry measuring cup to pack it down.
Bake for 20-25 minutes or until just starting to brown. The crust may feel soft, but it will firm up once it's cooled.
Set crust aside to cool.