Sour Cream Beef Noodle Casserole (High-Protein) Recipe

Prep Time	Cook Time	Total Time
25 min	35 min	1 h

How to Make Sour Cream Beef Noodle Casserole (High-Protein)

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Preheat oven and cook noodles

Preheat your oven to 350°F and lightly grease a 9x13 inch baking dish with nonstick spray or oil.
Place a rack in the center of the oven so the casserole bakes and browns evenly.
Bring a large pot of salted water to a boil and cook egg noodles until just al dente.
Drain the noodles well, then toss them with a drizzle of oil to prevent sticking.
Brown beef and vegetables

Set a large deep skillet over medium high heat and add the lean ground beef.
Cook the beef, breaking it up with a spatula, until no longer pink and starting to brown.
Add the diced onion and red bell pepper and cook until softened and lightly golden around the edges.
Stir in the minced garlic and cook just until fragrant, about thirty seconds, stirring constantly.
Season and simmer the sauce

Sprinkle in the salt, black pepper, paprika, Italian seasoning, and beef bouillon powder, stirring to coat the meat.
Pour in the tomato sauce and drained diced tomatoes, then stir until everything looks evenly combined.
Reduce the heat to medium low and let the sauce simmer for about five minutes to thicken slightly.
Mix the creamy layer

In a large bowl, stir together the sour cream, cottage cheese, garlic powder, and onion powder until smooth.
Taste the creamy mixture and add a small pinch of salt and pepper if you like.
Combine noodles, sauce, and creamy mixture

Add the cooked egg noodles to the bowl with the creamy mixture and gently toss until every noodle is coated.
Fold the beef and tomato sauce mixture into the noodles, stirring until the components look evenly distributed.
Transfer this mixture into the prepared baking dish, spreading it into an even layer.
Add the cheese topping

In a small bowl, toss the shredded cheddar and mozzarella together so the cheeses layer more evenly.
Scatter the mixed cheeses evenly over the top of the casserole, covering the surface from edge to edge.
Bake and rest before serving

Bake the casserole uncovered for 20 to 25 minutes, until the cheese is melted and bubbling around the edges.
If you like a deeper golden top, broil for one to two minutes, watching very closely to prevent burning.
Let the casserole rest for 10 minutes before serving so the layers can set and slice cleanly.

Substitutions

Sour cream with plain Greek yogurt: Use full-fat or 2% plain Greek yogurt instead of sour cream for extra protein and a slightly tangier flavor. The texture stays creamy and rich, and it bakes beautifully without separating.
Egg noodles with high-protein pasta: Swap the egg noodles for chickpea, lentil, or protein-enriched rotini to boost protein and add a pleasantly firm bite. Check the box instructions and undercook the pasta by one minute to avoid over-softening in the oven.
Lean ground beef with ground turkey: Ground turkey keeps the recipe high protein with a slightly lighter flavor and a bit less richness. Use at least 93% lean turkey, and brown it well to build deeper savory notes.

Tips

Brown the beef deeply: Let the beef cook undisturbed in the pan for a minute or two so it really browns, not steams. That browned fond on the pan brings rich, savory flavor to the entire casserole.
Cook noodles just to al dente: Stop cooking the egg noodles while they still have a firm bite so they do not turn mushy when baked. Overcooked noodles will soak up sauce and can make the casserole dry and pasty.
Adjust sauce thickness before baking: If the meat sauce looks very thick, add a splash of water so the casserole stays moist. If it looks soupy, simmer a few extra minutes until it lightly coats the beef and vegetables.
Shred your own cheese: Bagged shredded cheese contains anti-caking starches that can make the topping drier and less melty. Freshly shredded blocks melt smoother and give a nicer stretchy cheese pull.
Make-ahead and reheat smart: Assemble the casserole, cool, then cover tightly and refrigerate up to 24 hours before baking. When baking from cold, add about ten extra minutes so the center heats through safely.

Energy	590	kcal
Protein	37	g
Total Fat	34	g
Carbohydrates	37	g
Dietary Fiber	4	g

FAQ

Can I assemble this casserole ahead of time?: Yes, you can assemble it up to a day in advance, then cover and refrigerate until ready to bake. For best texture, slightly undercook the noodles so they do not soften too much overnight.
Why did my casserole turn out watery?: This usually happens when the tomatoes are not well drained or the noodles were undercooked and released extra water. Next time, drain the tomatoes thoroughly and cook noodles to al dente before mixing everything together.
Can I freeze this sour cream beef noodle casserole?: Yes, this casserole freezes well, especially if you freeze it before baking for the best texture. Wrap the dish tightly, freeze up to three months, then thaw overnight and bake until hot and bubbly.
How can I add even more protein to this recipe?: Stir in an extra half cup of cottage cheese or Greek yogurt, or use high-protein pasta instead of egg noodles. You can also add a can of drained black beans to the beef mixture for more protein and fiber.