Slow cooker mac and cheese combines tender elbow macaroni with a smooth sauce made from cheddar, Monterey Jack, cream cheese, whole milk, and evaporated milk. The slow cooker keeps the dish warm and eliminates the need to prepare a separate cheese sauce on the stovetop.
Briefly boiling the macaroni before adding it to the slow cooker produces a more reliable texture than cooking dry pasta entirely in dairy. The pasta finishes cooking slowly while absorbing the creamy cheese sauce.
This recipe works well for family dinners, potlucks, holidays, and gatherings where oven space is limited.
Why You’ll Love This Recipe
- The cheese sauce comes together directly in the slow cooker.
- Briefly parboiling the macaroni helps prevent unevenly cooked pasta.
- Cheddar provides flavor while Monterey Jack melts smoothly.
- Evaporated milk creates a creamy sauce without using condensed soup.
- The recipe serves a group and can stay warm briefly before serving.
- Bacon, vegetables, chicken, or spicy ingredients can be added easily.
Ingredients
- 1 pound elbow macaroni: Holds the creamy sauce inside and around each piece.
- 1 tablespoon kosher salt: Seasons the pasta water.
- 2 tablespoons unsalted butter, divided: Greases the slow cooker and coats the macaroni.
- 1 can (12 ounces) evaporated milk: Creates a creamy, stable sauce.
- 2 cups whole milk: Provides moisture and helps the pasta finish cooking.
- 8 ounces full-fat brick-style cream cheese, cubed and softened: Adds body and smoothness.
- 3 cups freshly shredded sharp cheddar cheese: Provides the primary cheese flavor.
- 2 cups freshly shredded Monterey Jack cheese: Melts smoothly and balances the sharper cheddar.
- 1 teaspoon Dijon mustard: Enhances the cheese flavor without making the sauce taste strongly of mustard.
- 1 teaspoon garlic powder: Adds mild savory seasoning.
- 1/2 teaspoon onion powder: Provides additional depth.
- 1/2 teaspoon smoked or sweet paprika: Adds color and mild flavor.
- 1/2 teaspoon kosher salt, plus more as needed: Seasons the cheese sauce.
- 1/4 teaspoon ground black pepper: Adds gentle warmth.
Ingredient Substitutions
- Elbow macaroni: Use small shells, cavatappi, or another short pasta. Cooking time may vary.
- Sharp cheddar: Substitute medium cheddar, Colby, or a combination of cheddar varieties.
- Monterey Jack: Use Colby Jack, mild Gouda, or low-moisture mozzarella.
- Cream cheese: Replace it with 8 ounces of cubed American cheese for an especially smooth sauce.
- Evaporated milk: Use an additional 1 1/2 cups whole milk or half-and-half, although the sauce may be slightly less stable.
- Whole milk: Two-percent milk can be used for a lighter sauce.
- Dijon mustard: Substitute 1/2 teaspoon dry mustard powder or omit it.
- Unsalted butter: Use salted butter and reduce the additional salt.
How to Make Slow Cooker Mac and Cheese
- Boil the pasta water.
Bring a large pot of water to a boil. Add 1 tablespoon kosher salt. - Parboil the macaroni.
Add the elbow macaroni and cook it for approximately 5 minutes, or about 2 to 3 minutes less than the package’s al dente time. The pasta should be flexible but still noticeably firm in the center. - Drain the macaroni.
Drain the pasta thoroughly without rinsing it. Toss it with 1 tablespoon of butter to prevent sticking. - Prepare the slow cooker.
Use the remaining tablespoon of butter to grease the bottom and sides of a 5- or 6-quart slow cooker. - Combine the dairy ingredients.
Add the evaporated milk, whole milk, softened cream cheese, Dijon mustard, garlic powder, onion powder, paprika, salt, and black pepper to the slow cooker. Whisk or stir until mostly combined. Small pieces of cream cheese will melt during cooking. - Add the macaroni.
Transfer the drained macaroni to the slow cooker and stir until evenly coated with the milk mixture. - Add the shredded cheese.
Stir in the cheddar and Monterey Jack, reserving about 1 cup of the combined cheese for the top. - Add the final cheese layer.
Sprinkle the reserved cheese evenly over the macaroni. - Slow-cook the mac and cheese.
Cover and cook on low for 1 1/2 to 2 hours. Stir after the first 45 minutes, then check and stir approximately every 30 minutes. - Check the consistency.
The mac and cheese is ready when the pasta is tender and the sauce is smooth and creamy. If it becomes too thick, stir in warm milk a few tablespoons at a time. - Rest before serving.
Turn off the slow cooker and let the mac and cheese stand uncovered for 5 to 10 minutes. Stir gently, taste, and add more salt or pepper if needed.
Tips for the Best Slow Cooker Mac and Cheese
- Parboil the macaroni rather than cooking it completely before adding it.
- Use full-fat dairy for a smoother, richer sauce.
- Shred cheese from a block because pre-shredded cheese contains coatings that can affect melting.
- Soften and cube the cream cheese so it blends more quickly.
- Cook only on low heat, as high heat can make the sauce separate.
- Begin checking after 1 1/2 hours because slow cookers vary significantly.
- Avoid leaving the finished mac and cheese on the warm setting for several hours.
Common Mistakes to Avoid
Fully Cooking the Pasta First
Completely cooked macaroni may become mushy in the slow cooker. Boil it only until very firm.
Using High Heat
High heat can cause the dairy to separate and the cheese to become oily. Use the low setting.
Using Only Pre-Shredded Cheese
Anti-caking ingredients on packaged shredded cheese can produce a less-smooth sauce. Freshly shred the cheese when possible.
Cooking for Too Long
The pasta continues absorbing liquid while it sits. Remove the heat as soon as the macaroni is tender.
Adding Cold Milk to Thickened Mac and Cheese
If the sauce needs thinning, use warm milk so the temperature does not drop suddenly.
Variations
Bacon Mac and Cheese
Fold 8 slices of cooked, crumbled bacon into the finished mac and cheese. Reserve some for garnishing.
Jalapeño Mac and Cheese
Add one finely diced jalapeño and replace 1 cup of Monterey Jack with pepper Jack cheese.
Broccoli Mac and Cheese
Stir in 2 cups of lightly steamed, chopped broccoli during the final 20 minutes.
Buffalo Chicken Mac and Cheese
Fold in 2 cups shredded cooked chicken and 1/3 cup Buffalo sauce during the final 20 minutes.
Breadcrumb-Topped Mac and Cheese
Toast 1 cup panko breadcrumbs with 2 tablespoons butter in a skillet. Sprinkle them over the mac and cheese immediately before serving.
What to Serve With Slow Cooker Mac and Cheese
- Southern fried chicken
- Slow cooker pulled pork
- Meatloaf
- Barbecue ribs
- Green beans or collard greens
- Roasted broccoli or a simple salad
How to Store
Allow leftover mac and cheese to cool before transferring it to an airtight container. Refrigerate for 3 to 4 days.
Reheat it gently in a saucepan over low heat with a splash of milk. Individual portions can be microwaved in short intervals, stirring between each interval and adding milk as needed.
Mac and cheese can be frozen for up to 2 months, although the pasta may soften and the sauce may separate slightly after thawing. Thaw it overnight in the refrigerator and reheat slowly with additional milk.
Frequently Asked Questions
Can I add uncooked pasta directly to the slow cooker?
Some recipes use dry pasta, but cooking times and liquid absorption can vary considerably. Parboiling provides a more consistent texture for this recipe.
Why did my cheese sauce become grainy?
The heat may have been too high, the dish may have cooked too long, or the cheese may not have melted smoothly. Use low heat and freshly shredded cheese.
Can I keep mac and cheese warm in the slow cooker?
Yes, but only briefly. Use the warm setting for up to about one hour and stir in milk if the sauce begins thickening.
Can I use gluten-free pasta?
Yes, but gluten-free pasta may soften more quickly. Parboil it very briefly and begin checking the slow cooker earlier.
Can I double the recipe?
Yes, if using a large 7- or 8-quart slow cooker. Avoid filling the cooker more than approximately two-thirds full, and allow additional cooking time.
Why is my mac and cheese dry?
The pasta may have cooked too long or absorbed more liquid than expected. Stir in warm milk until the sauce becomes creamy again.
Can I prepare the ingredients ahead?
The cheeses can be shredded and the seasonings measured one day ahead. For the proper texture, boil the macaroni and assemble the dish shortly before slow cooking.
Final Thoughts
Slow cooker mac and cheese provides creamy pasta without requiring a separate stovetop cheese sauce. Parboiling the macaroni, using freshly shredded cheese, and checking the slow cooker early help prevent mushy pasta and separated sauce.