Delicious Slow Cooker Cheesy Vegetable Casserole

Section: Perfect Side Dishes to Complete Any Meal

Toss together California blend veggies plus cheddar and a can of soup in your slow cooker. Let it bubble away for full flavor and soft veggies. Sprinkle more cheese on at the end and let it melt for a melty, golden top. It’s hands-off, so you can chill out while it cooks. This is awesome as a simple side during any get-together or family dinner. Scoop it up hot and pair with whatever main you like.

A woman wearing glasses smiles for the camera.
Published By Ioana
Updated on Thu, 15 May 2025 22:41:53 GMT
Casserole with veggies and cheese in a plastic bowl. Bookmark
Casserole with veggies and cheese in a plastic bowl. | ioanacooks.com

This Slow Cooker Cheesy Vegetable Casserole is the kind of hands-off comfort food I turn to when prepping big family dinners or holiday meals. Toss everything in your slow cooker before guests arrive and you will have a creamy bubbling side dish ready when the main course lands on the table. Whether you are feeding a crowd or just want more veggies with dinner this recipe could not be easier.

I first made this for a busy holiday dinner and my guests scraped the pot clean before we even sat down for dessert. The cheesy sauce pulls the veggies together in a way that sells even the non vegetable lovers in my crew.

Ingredients

  • California medley vegetables: I go for the frozen blend of broccoli cauliflower and carrots because it saves chopping time and always turns out tender
  • Cheddar cheese condensed soup: Creates a creamy base with robust cheesy taste Look for low sodium if you want to keep salt in check
  • Vegetable broth: Adds moisture and lets the flavors blend together Make sure to use a good quality broth for the best result
  • Shredded cheddar cheese: Sprinkled throughout the casserole for ultimate cheese pulls Choose a sharp cheddar for more punch and grate your own if possible for melty texture

Step by Step Instructions

Prepare Ingredients:
Add the California medley vegetables directly to your slow cooker straight from the freezer They will thaw and cook perfectly in the dish
Mix the Cheesy Base:
Pour in the cheddar cheese condensed soup and vegetable broth then sprinkle half of the shredded cheddar cheese Stir everything together making sure the veggies are coated well by the cheesy base
Slow Cook:
Cover the slow cooker and cook on low for three to four hours During this time the vegetables will soften and the flavors meld together
Finish with More Cheese:
Uncover and top with the remaining shredded cheddar cheese Replace the lid and let it cook for thirty more minutes allowing the cheese to fully melt and the casserole to reach an extra creamy finish
Serve and Enjoy:
Scoop the finished casserole into bowls or serve as a side from the slow cooker itself The vegetables should be easily pierced with a fork and the cheese should be bubbly and golden
Une casserole de légumes et de fromage dans un bol en plastique. Bookmark
Une casserole de légumes et de fromage dans un bol en plastique. | ioanacooks.com

One of my favorite parts is watching that thick cheesy layer on top melt down and hug every last bit of broccoli and carrot My kids always fight for the cheesiest scoop and I love sneaking in extra vegetables when they taste this good

Storage Tips

Keep leftovers in an airtight container for up to four days in the fridge Reheat gently in the microwave or even return to the slow cooker on low if serving again for a crowd The texture holds up especially when reheated slowly

Ingredient Substitutions

Try using Monterey jack or a blend of mozzarella for a slightly different flavor profile You can also use different frozen mixed vegetable blends if you want extra color or to use what is on hand For a richer flavor a splash of heavy cream with your broth makes it even silkier

Serving Suggestions

This casserole pairs well with roasted chicken turkey or even a fresh green salad It works as a hearty vegetarian main if you stir in cooked quinoa or brown rice right before serving Sometimes I scatter crispy onions or breadcrumbs on top for crunch

Un bol de macaroni et légumes, y compris des carottes, des brocolis et des pommes de terre, est sur un plateau. Bookmark
Un bol de macaroni et légumes, y compris des carottes, des brocolis et des pommes de terre, est sur un plateau. | ioanacooks.com

Cultural and Historical Context

Dishes like this casserole were made popular during the heyday of slow cookers in the seventies and remain staples for their ease and crowd pleasing flavor Cheesy vegetable casseroles often featured at potlucks Sunday suppers or holiday spreads because they stretch ingredients while delivering familiar cheesy comfort

Frequently Asked Questions About Recipes

→ Which veggies come in a California medley?

A California mix usually gives you carrots, broccoli, and cauliflower all in one, so you get a colorful mix every time you dig in.

→ Can I swap in fresh instead of frozen veggies?

Totally. Chop up some fresh vegetables and toss them in—just keep an eye out so they don’t get too soft as they cook.

→ What kind of cheese works best?

Cheddar’s the classic pick because it melts well and has great flavor. You can try a blend, too, for extra tastiness.

→ What stops the casserole from turning out watery?

Pat or drain any extra liquid off frozen veggies before you throw them in. Keep the lid closed while it cooks so steam doesn’t mess with the texture.

→ Is it okay to make this a day ahead?

Yep, just cook it ahead of time, let it chill, and warm it up when you’re ready to eat. Still tastes awesome.

→ How can I punch up the flavor?

Toss in whatever spices or herbs you like, or shake in some garlic powder if that’s your thing.

Cheesy Veggie Casserole

California vegetables mix with creamy cheese and get gooey and tender right in the slow cooker.

Time Needed to Prep
5 minutes
Cooking Duration
270 minutes
Overall Time
275 minutes
Published By: Ioana

Category of Recipe: Side Dishes

Preparation Difficulty: Easy to Make

Type of Cuisine: American

Number of Portions: 6 How Many It Serves (servings)

Dietary Preferences: Made for Vegetarians

Ingredients You'll Need

→ Main

Ingredient 01 120 g cheddar cheese, shredded (keep half for later, half for mixing in)
Ingredient 02 120 ml veggie broth
Ingredient 03 300 g condensed cheddar cheese soup
Ingredient 04 680 g frozen California mix veg—usually broccoli, cauliflower, carrots (that's two 340 g bags)

Steps to Follow

Step 01

Throw your frozen California veggies, soup, half the shredded cheddar, and veggie broth into the slow cooker. Give everything a solid stir so it’s all mixed up.

Step 02

Pop the lid on and set the slow cooker to low. Leave it for about 3 to 4 hours. You want the veggies almost soft.

Step 03

Scatter the rest of the cheddar across the top. Put the lid back on.

Step 04

Let it stay on low for another 30 minutes. Wait for the cheese on top to melt and your veggies to get super soft. That means it’s done.

Extra Tips

  1. Keep the lid on while it's cooking. If you open it early, your veggies will take longer to get soft.

Tools You'll Need

  • Slow cooker
  • Mixing spoon
  • Measuring cups

Allergen Information

Carefully check food labels for allergens and consult an expert if you're uncertain.
  • Has milk and milk-based stuff

Nutritional Information (Per Serving)

Remember, these values are for guidance only and shouldn't replace advice from a professional.
  • Calories Per Serving: 232
  • Total Fat: 11 grams
  • Carbohydrate Amount: 23 grams
  • Protein Amount: 11 grams