Why not pumpkin instead of squash? We've tried that. Pumpkin is too watery and bland. Squash is creamier and sweeter. So, choosing squash over pumpkin is a no-brainer.Tips for the tastiest squash soup: First, roast the squash to remove water and concentrate the flavors. Second, make a spice base by caramelizing onion in butter. And, third, use the best chicken bone broth.