Add chicken broth, minced garlic, clam juice and tomato paste to Instant Pot and whisk together
Using a mortar and pestle, smash the rosemary, thyme, pepper, celery seed, fennel seed and pepper flakes enough that they remain whole but are broken to more easily release flavor. Alternatively, use a Mini Prep Chopper and pulverize the spices just to break apart.
Mix spices into broth.
Lock on lid and close pressure valve. Cook at high pressure (most machines default to high pressure) for 10 minutes.
When Beep sounds, wait 15 minutes and then release the rest of the pressure.
Open lid and stir in beer (if you have saved one cup from prior batch, add that in now too).
Select Sauté/Browning on your Pressure Cooker and allow broth to come to a low simmer.
Once liquid is simmering, add butter and mix through.
Add shrimp (keep tails on for more flavor) and mix through.
Once the shrimp are no longer transparent, they are ready to serve.
Ladle shrimp and broth into bowls and serve with plenty of sliced crusty bread, for soaking up the delicious broth.
Serve with a fresh and hot Country Sourdough Batard or French Bread.If this is the first time making this recipe, pour a cup of liquid into a freezer safe container and freeze. The next time you make Killer Shrimp, add the reserved liquid into the Instant Pot prior to adding butter. This will intensify the flavor and make each future batch better and better.