In a small pot, bring ¼ cup water to a low boil.
Add the frozen green peas to the boiling water. Return to a boil, cover, reduce the heat to medium-low, and cook for 4 to 5 minutes at a steady simmer.
Transfer the peas and cooking liquid to a blender. Process until very smooth, scraping down the sides as needed.
Transfer to a small bowl, let cool to room temperature, then serve or store until ready to use. Store in an airtight container in the refrigerator for 3 to 5 days or in the freezer for 4 to 6 months.