Step 1

Place beans, oil, 3 quarts water, and 1 teaspoon salt in a 6-to-8-quart pressure cooker.

Step 2

Stovetop:Secure lid. Bring to high pressure over medium-high heat; reduce heat to maintain pressure and cook 20 minutes. Remove from heat and quickly release pressure (loosely cover vent with a clean kitchen towel), then remove lid. Electric: Secure lid. Manually set cooker to 25 minutes and let it come to pressure. Once time is complete, turn off and quickly release pressure (loosely cover vent with a clean kitchen towel), then remove lid.

Step 3

Let beans stand in cooking liquid 30 minutes; drain.