Macaroni and Cheese Soup is this week’s SOUPin15 Recipe. It’s creamy and luscious with all the flavors of macaroni and cheese, but in a soup!
Did you know that we need to thank Thomas Jefferson for making Macaroni and Cheese so popular in the United States? He loved it so much that he served it to dinner guests when he was president. There’s even a recipe for homemade pasta (called ‘macaroni’ by Jefferson) that Jefferson himself wrote down. And, the man sketched a pasta maker. You know he must have loved the stuff!

Macaroni and Cheese
We now see Macaroni and Cheese everywhere, from fancy restaurants to home kitchens to boxes with packets of orange powder, and, to my favorite, diners.
I’ve got to tell you that some of the best Macaroni and Cheese I’ve had in ages was in a diner. I haven’t stopped thinking about it since I tasted it. I found myself wanting more and then dreaming about these Fried Mac ‘n’ Cheese Bites. And now, here I am sharing a Macaroni and Cheese Soup with you!
Making It Quickly
This Macaroni and Cheese Soup is part of my SOUPin15 Series, each ready from start to finish in under 15 minutes.
Every week when I share my SOUPin15 recipe I also share the Souper Tip that makes the soup so delicious in such a short time. Today’s Souper Tip is CHEESE!
You probably know that cheese as an amazing ingredient in soup. It can make the liquid of a soup so luscious. Sprinkled on top, it’s a perfect gooey garnish. I don’t need to tell you about that. What I want to tell you about today is the technique for adding cheese to the broth of a soup.
What you don’t want is for the cheese to end up clumpy or grainy. You want it smooth. To achieve this, first thicken the broth using a flour and water mixture. If your soup is already thick from some other ingredient (potatoes, cornstarch, pureed legumes, or pureed vegetables, for instance) you don’t need to add flour and water. The thickness is to give the cheese something to cling onto so it’s not just clumping at the bottom.
Once you have your thick hot soup, take it off the heat and add shredded cheese, a kind that melts easily. Stir as it melts in. Then serve. You don’t want to continue heating the soup once you’ve added the cheese. This is what can make the cheese separate and get a weird texture. So don’t put it back on the stove top. Just use the heat of the soup to melt the cheese in and you’ll be fine.
Print
Cauliflower Macaroni and Cheese Soup
- Prep Time: 0 minutes
- Cook Time: 15 minutes
- Total Time: 15 minutes
- Yield: 4 servings 1x
- Category: Soup
- Method: Stovetop
- Cuisine: American
DESCRIPTION
It’s creamy and luscious with all the flavors of macaroni and cheese, but in a soup! Note that you need to serve this soup immediately. Otherwise, the noodles keep soaking up the liquid and you end up with creamy Macaroni and Cheese. Not a bad thing, but no longer soup. If you do want to serve it as soup once it has soaked up the liquid, add extra broth or some milk and heat it gently while stirring continuously until heated through.
Note: To have this recipe ready in under 15 minutes first make sure that you’ve read through the whole thing. Then gather together all of the tools, pots, bowls, spoons, other tools and all of the ingredients that you will need. Having everything at your fingertips will make the cooking go more quickly. But you need not prep any ingredients. All prep is included within the instructions and is included in the 15 minute time. See you in 15!
Ingredients
- 4 cups low-sodium chicken or vegetable broth
- ¾ tsp. salt
- 1 cup uncooked elbow macaroni noodles
- ¼ cup flour
- ⅛ tsp. cayenne
- 1 and ½ cups milk
- 1 lb. packaged cauliflower florets
- 8 oz. sharp cheddar cheese
- 1 Tbsp. dijon mustard
- salt and pepper to taste
Instructions
- Put a large pot or Dutch oven over high heat. Add the chicken broth. Cover the pot and bring it to a boil. When the broth reaches a boil add the salt and the macaroni elbows. Return it to a boil and then reduce heat to a simmer. Stir occasionally until cooked, about 7 minutes.
- Remove from heat but do not drain them.
- While the broth is coming to a boil, measure the flour and cayenne into a mason jar. Add the milk and put the lid on the jar. Shake it a lot, tipping it around and upside down to dislodge all flour and to get it well blended. Set aside.
- Put the cauliflower florets into a large microwave-safe bowl and microwave them 2 minutes at a time until tender, about 4-6 minutes.
Shred the cheese. - By now the noodles are probably cooked. Remember, don’t drain them just remove the pot from the heat. Give your mason jar of flour another good shake and then add it to the pot all at once. Stir. Return the pot to high heat and bring it to a boil, stirring often. Add the cauliflower and the dijon.
- Remove pot from heat and stir in most of the cheese, saving about ¼ cup for a garnish if desired. Season to taste with salt and pepper. Serve garnished with the reserved cheese.

Karen L says
We must have been raised the same way when it comes to cooking. Only difference is I don’t like the flavor of evaporated milk so I don’t use it. Love all your shortcuts.
Christine Pittman says
Karen, You can use half and half or milk instead. No problem.
Kris says
I cooked the cauliflower and then ran it through a food processor. I used it to thicken the soup instead of the flour. It turned out great! Everyone loved it and the kids didn’t know about the cauliflower. ;)
Christine Pittman says
Kris, What a great idea! Love it. I’m going to try that next time I make it for sure.
Karen D says
This looks delicious! So creamy, veggies included, and quick to make. Wins all around!