To the Instant Pot or pressure cooker, add 1 block of ramen noodles, 1 cup of mixed vegetables (frozen), and 1 ½ cups vegetable broth.
Close the lid and set the valve to sealing.
Pressure cook on HIGH for 1 minute.
While the Instant Pot is cooking, whisk 1 tablespoon of white miso paste with ¼ cup hot water until it combines and there are no clumps.
After the 1 minute timer, release the steam until the floating pin drops, then open the lid.
Stir the noodles.
Set the Instant Pot to Sauté. Add the miso mixture, ½ cup of coconut cream, and 1 tablespoon vegan butter.
Continue stirring and sauté for about 5 more minutes, until the soup becomes a bit thicker and less watery.
Serve miso ramen in a bowl and garnish with sliced scallions, sesame seeds, and garlic chili oil.