Question: how long to cook 2 lbs of frozen chicken breast in instant pot?
Answer: To the Instant Pot, add water and place trivet inside.
Lay frozen chicken breasts in a single layer. ... 
Sprinkle with spices if using any. ... 
Close the lid, set pressure vent to Sealing and press Pressure Cooking on High (Duo model) or Manual (LUX) for 15-18 minutes.*