Today, we're sharing our recipe for the best instant pot butternut squash soup. Before we get started, here's what you'll need: 1 medium butternut squash (about 2 3/4 lbs), peeled and thinly sliced 2 medium carrots, thinly sliced 2 cloves garlic, pressed 1 large onion, thinly sliced 1 stalk celery, thinly sliced Kosher salt and pepper 6 sprigs fresh thyme 4 sprigs fresh sage, plus 15 sage leaves 4 cups low-sodium chicken broth 3 tbsp.