In a large stock pot over medium heat, cook the bacon until it is crisp. Remove from the pot with a slotted spoon and transfer to a paper towel-lined plate. Drain off the excess grease, but there is no need to clean the pot.
4 slices thick-cut bacon
Return the pot to medium heat and add the Italian sausage and break it up, browning it for about 3 to 5 minutes until you no longer see pink.
1 pound hot Italian sausage
Add in onions, garlic, salt, pepper, and crushed red pepper flakes. Cook for 3 minutes.
1 medium yellow onion, 4 garlic cloves, 1 teaspoon kosher salt, 1/4 teaspoon black pepper, 1/4 teaspoon crushed red pepper flakes
Add the chicken broth and bring to a roaring boil. Add in the potatoes and turn down the heat to a simmer. Cook until the potatoes are fork-tender, about 15 minutes.
6 cups chicken broth, 4 Yukon gold potatoes
Add the kale and let it wilt, about 2 minutes. Then add in the heavy cream.
4 cups kale, 1 cup heavy cream
Return the bacon to the pot, and add more salt and pepper to taste.