Slow Cooker Ground Beef & Shells Casserole

A hearty, creamy, and family-friendly comfort meal made with tender pasta shells, seasoned ground beef, rich tomato sauce, and melted cheese — all slowly cooked together for deep flavor and easy preparation. This recipe is perfect for busy weeknights, meal prep, potlucks, or cozy dinners.

Recipe Overview

• Prep Time: 15 minutes
• Cook Time: 3–4 hours (Low)
• Total Time: About 4 hours
• Servings: 6 servings
• Difficulty: Easy

Ingredients

Main Ingredients

• 1 pound lean ground beef
• 1 small onion, diced
• 3 cloves garlic, minced
• 3 cups beef broth
• 1 can (15 oz) tomato sauce
• 1 can (14.5 oz) diced tomatoes
• 1 teaspoon Italian seasoning
• 1 teaspoon paprika
• ½ teaspoon salt
• ½ teaspoon black pepper
• 2 cups medium pasta shells
• 1 cup sour cream
• 2 cups shredded cheddar cheese
• 1 tablespoon olive oil

Optional Add-Ins

• Mushrooms
• Bell peppers
• Spinach
• Crushed red pepper flakes
• Parmesan cheese

Instructions

Step 1: Brown the Beef

Heat olive oil in a skillet over medium heat. Add ground beef and onion. Cook until beef is browned and onions are soft. Drain excess grease if necessary.

Add garlic and cook for 30 seconds until fragrant.

Step 2: Build the Slow Cooker Base

Transfer the beef mixture to the slow cooker.

Add:

• beef broth
• tomato sauce
• diced tomatoes
• Italian seasoning
• paprika
• salt
• pepper

Stir everything together.

Step 3: Slow Cook

Cover and cook on LOW for 2½–3 hours.

Step 4: Add Pasta

Stir in uncooked pasta shells.

Cover and cook another 20–30 minutes, or until pasta is tender.

Step 5: Make It Creamy

Turn off heat.

Stir in:

• sour cream
• 1½ cups cheddar cheese

Mix until creamy and melted.

Top with remaining cheese, cover for 5 minutes, and allow cheese to melt before serving.

Description & Flavor Notes

This casserole combines the richness of a cheeseburger-style pasta dish with the convenience of slow cooking. The pasta absorbs the savory tomato-beef broth while cooking, creating a thick and flavorful sauce. Sour cream adds creaminess while cheddar gives it a gooey, comforting finish.

The result is:

• Creamy
• Cheesy
• Savory
• Filling
• Kid-friendly

Expert Tips

Use Lean Beef

Lean ground beef keeps the casserole rich without becoming greasy.

Don’t Overcook the Pasta

Add pasta near the end so it stays tender instead of mushy.

Grate Your Own Cheese

Freshly shredded cheese melts smoother than pre-packaged cheese.

Add Vegetables

Spinach, mushrooms, or zucchini blend in well and increase nutrition.

Make It Spicy

Add jalapeños or chili flakes for heat.

Serving Suggestions

Serve with:

• Garlic bread
• Green salad
• Roasted vegetables
• Steamed broccoli

Storage & Reheating

Refrigerator

Store in an airtight container for up to 4 days.

Freezer

Freeze for up to 2 months.

Reheating

Reheat in the microwave or stovetop with a splash of broth or milk to loosen the sauce.

Nutritional Information (Approximate Per Serving)

Benefits of This Recipe

High in Protein

Ground beef and cheese provide satisfying protein for muscle maintenance and fullness.

Convenient One-Pot Meal

Minimal cleanup and simple preparation make it ideal for busy schedules.

Family Friendly

Mild flavors and creamy texture are usually a hit with kids and adults alike.

Budget Friendly

Uses affordable pantry staples and stretches well for multiple servings.

Great for Meal Prep

Reheats beautifully for lunches and leftovers.

Variations

Tex-Mex Version

Add taco seasoning, corn, and pepper jack cheese.

Healthier Version

Use ground turkey, whole wheat pasta, and Greek yogurt instead of sour cream.

Extra Creamy

Mix in cream cheese or heavy cream.

Gluten-Free

Use gluten-free pasta shells.

Frequently Asked Questions

Can I use a different pasta?

Yes. Elbow macaroni, rotini, or penne work well.

Can I cook the pasta separately?

Absolutely. Stir cooked pasta in at the end for better texture control.

Can I make this ahead?

Yes. Brown the beef mixture ahead of time and refrigerate overnight.

Why did my pasta turn mushy?

It likely cooked too long in the slow cooker. Add it only during the final cooking stage.

Can I freeze leftovers?

Yes. Cool completely before freezing in airtight containers.

Recipe Notes

• Different slow cookers heat differently; check pasta early.
• Sharp cheddar gives the best flavor.
• For thicker casserole, reduce broth slightly.
• For soupier consistency, add extra broth.

Quick Summary

This Slow Cooker Ground Beef & Shells Casserole is:

• Creamy
• Hearty
• Cheesy
• Easy to prepare
• Excellent for meal prep
• Perfect comfort food for families and gatherings