Step 1

Combine oil and boiling water in a medium or large heatproof mixing bowl or vessel. Using a whisk or immersion blender, vigorously but carefully mix the oil and hot water until well combined, 30 seconds to 1 minute. Set vessel aside until water and oil separate, 30 minutes to 1 hour.

Step 2

Pour or spoon oil into separate container, taking care to leave any and all water in original container. Discard water and reserve oil for use in mayonnaise or aioli.