Pantry Staple One Pot Creamy Tomato and Cheddar Casserole

There’s a moment—usually around 5:47 p.m.—when I open the fridge and realize I never made it to the store. Again. The produce drawer holds one lonely carrot, the protein situation is “questionable,” and the only thing keeping me from panic-ordering take-out is the knowledge that my pantry has my back. That’s exactly how this One Pot Creamy Tomato & Cheddar Casserole was born. It’s the dish I turn to when the day has been long, the budget is tight, and everyone at the table wants something that tastes like I actually tried. One pot, twenty-ish minutes, and a handful of shelf-stable heroes later, we’re scooping up saucy, cheesy, carb-y comfort that silences the “what’s for dinner?” chorus faster than you can say “pass the hot sauce.”

I first whipped this up during a snowy week when even Amazon Prime couldn’t save us from empty shelves. A can of crushed tomatoes, half a box of pasta, and the dregs of a cheddar bag later, my skeptical spouse took a bite and announced, “This tastes like the inside of a grilled cheese dunked in tomato soup—only better.” High praise from someone who usually reserves enthusiasm for steak. Since then, it’s become our busy-weeknight default, our “company’s coming and I forgot to plan” lifesaver, and the recipe my college-niece requests every time she visits because it’s cheap, filling, and tastes like childhood. If you can boil water and open a can, you can master this casserole. Let me show you how.

Ingredients You'll Need

Below are the everyday warriors that create magic together. I’ve added notes so you can shop smart or improvise like a pro.

• 12 oz (340 g) dried short pasta – rotini, penne, or elbows grab the most sauce. Whole-wheat, gluten-free, or high-protein all work; just shave 1–2 minutes off the boil time.
• 1 Tbsp olive oil + 1 Tbsp butter – the combo prevents sticking and adds flavor. Swap in coconut oil or all butter if that’s what’s within reach.
• 1 small onion, finely diced – yellow keeps it classic, but red or shallots are fine. Freeze-dried onion rehydrates in the butter if you’re out of fresh.
• 2 cloves garlic, minced – jarred minced garlic is ¼ tsp per clove. Garlic powder works at ½ tsp, stirred in with the tomatoes so the granules hydrate.
• 2 Tbsp tomato paste – buy the tube so you can use a little at a time. In a pinch, sub 2 Tbsp ketchup + ½ tsp extra paprika for depth.
• 1 tsp smoked paprika – the quiet MVP that makes cheddar taste “grilled.” Regular paprika is acceptable, but add a pinch of chipotle powder if you miss the smoke.
• Pinch red-pepper flakes – optional, but kids usually don’t notice ⅛ tsp. Omit for ultra-mild or double for zing.
• 1 can (28 oz/800 g) crushed tomatoes – fire-roasted add instant complexity. If you only have diced, blitz them briefly with their juice in the blender.
• 2 cups (480 ml) low-sodium chicken or veggie broth – water + 2 tsp bouillon powder is perfectly respectable.
• ½ cup (120 ml) heavy cream OR canned evaporated milk – either gives lush body. Greek yogurt separates, so avoid unless stirred in off-heat.
• 1 tsp Dijon mustard – you won’t taste it, but it sharpens the tomato-cheddar duet. Dry mustard (½ tsp) or yellow mustard (1 tsp) are fine understudies.
• 2 cups (8 oz/225 g) sharp cheddar, shredded – shred from a block; pre-bagged anti-caking cellulose can turn grainy. Mild, medium, or a 50/50 cheddar-Gruyère blend all sing.
• ½ cup grated Parmesan – the umami booster. Shelf-stable canned Parm works, but fresh is next-level.
• Salt & freshly ground black pepper – add at the end; canned tomatoes vary in sodium.
• Optional garnish: chopped parsley, basil, or chives for color; toasted breadcrumbs for crunch; hot sauce for the rebels.

How to Make Pantry Staple One Pot Creamy Tomato and Cheddar Casserole

Expert Tips

Variations to Try

• Bacon Cheddar Bliss: Sauté 4 strips chopped bacon before the onion; use rendered fat instead of butter.
• Spicy Buffalo Twist: Replace half the crushed tomatoes with Buffalo wing sauce and finish with crumbled blue cheese.
• Hidden Veg Boost: Stir in 1 cup frozen spinach or diced zucchini with the pasta; extra broth may be needed.
• Luxury Upgrade: Swap heavy cream for ½ cup Boursin + ¼ cup mascarpone, and use Gruyère in place of cheddar.
• Tex-Mex Style: Season with cumin & chili powder, fold in black beans, top with pepper-jack, and serve with tortilla chips.
• Protein Punch: Add 2 cups shredded rotisserie chicken or canned tuna during the cheese step for an all-in-one meal.

Storage Tips

Refrigerate: Cool completely, transfer to an airtight container, and refrigerate up to 4 days. Reheat gently with a splash of broth or milk on the stovetop or microwave at 70 % power.

Freeze: Portion into freezer-safe zip bags, press out excess air, and freeze flat up to 3 months. Thaw overnight in the fridge or reheat from frozen in a saucepan with ¼ cup water, covered, over low heat.

Make-Ahead Casserole: Assemble through step 5, press plastic wrap directly onto surface, and refrigerate up to 24 hours. When ready to serve, warm on the stove over low, add cream, proceed with cheese step, and broil.

Frequently Asked Questions

Can I use milk instead of heavy cream?

Whole milk works but simmer very gently to prevent curdling; evaporated milk is creamier and more stable. Avoid skim—it’ll taste watery.

Is this gluten-free?

Simply substitute your favorite gluten-free short pasta; the rest of the ingredients are naturally GF. Check broth and mustard labels for hidden wheat.

Can I halve the recipe?

Yes—use a 3-qt saucepan and halve all ingredients, but keep the same cook times. Leftovers reheat well for lunch.

My cheese got gritty—what happened?

Two culprits: heat too high (proteins seized) or pre-shredded cheese (cellulose). Melt gradually over low and use block cheese you shred yourself.

Can I bake this in the oven?

Absolutely. After step 5, transfer to a buttered 9×13-inch pan, top with remaining cheese, and bake at 400 °F (200 °C) for 10 minutes until bubbly.

What protein pairs well?

main-dishes

Print Recipe Pin Recipe

Pantry Staple One Pot Creamy Tomato and Cheddar Casserole

(4.9 from 127 reviews)

Prep

10 min

Cook

20 min

Servings

6

Ingredients

• 12 oz dried short pasta (rotini or penne)
• 1 Tbsp olive oil
• 1 Tbsp butter
• 1 small yellow onion, finely diced
• 2 cloves garlic, minced
• 2 Tbsp tomato paste
• 1 tsp smoked paprika
• Pinch red-pepper flakes (optional)
• 1 can (28 oz) crushed tomatoes
• 2 cups low-sodium chicken or vegetable broth
• ½ cup heavy cream or evaporated milk
• 1 tsp Dijon mustard
• 2 cups shredded sharp cheddar, divided
• ½ cup grated Parmesan
• Salt & black pepper to taste
• Fresh parsley for garnish (optional)

Instructions

1. Sauté aromatics: Heat olive oil and butter in a Dutch oven over medium. Add onion; cook 3 min. Stir in garlic, tomato paste, paprika, and pepper flakes; cook 1 min.
2. Build sauce: Add crushed tomatoes, broth, Dijon, and ½ tsp salt. Simmer 5 min.
3. Add pasta: Stir in pasta; cover and cook 8 min, stirring twice, until just al dente.
4. Make it creamy: Pour in cream; simmer 2 min until thick.
5. Melt cheese: Reduce heat to low. Stir in Parmesan and 1½ cups cheddar until melted. Taste; season.
6. Broil: Top with remaining cheddar; broil 2 min or cover and let melt on stove 1 min. Rest 5 min, garnish, serve.

Recipe Notes

For ultra-smooth sauce, shred your own cheese and melt over low heat. Add a splash of broth when reheating to loosen leftovers.

Nutrition (per serving)

462

Calories

21g

Protein

54g

Carbs

17g

Fat