Why I’ll Love This Recipe

I enjoy this recipe because the slow cooker does most of the work while I focus on other things. The layers become perfectly tender, the cheeses melt together beautifully, and the spinach adds freshness to every bite. I also like that I can prepare it ahead of time and enjoy delicious leftovers throughout the week.

Ingredients

(Tip: You’ll find the full list of ingredients and measurements in the recipe card below.)

lasagna noodles
ricotta cheese
mozzarella cheese, shredded
Parmesan cheese, grated
fresh spinach, chopped
marinara sauce
egg
onion, finely diced
garlic cloves, minced
Italian seasoning
dried basil
salt
black pepper
olive oil
fresh parsley for garnish (optional)

Directions

I lightly grease the inside of the slow cooker with olive oil or cooking spray.
I combine the ricotta cheese, egg, Parmesan cheese, chopped spinach, garlic, Italian seasoning, basil, salt, and black pepper in a large bowl.
I spread a thin layer of marinara sauce over the bottom of the slow cooker.
I place a layer of lasagna noodles over the sauce, breaking them as needed to fit.
I spread part of the ricotta and spinach mixture over the noodles.
I sprinkle a layer of shredded mozzarella on top.
I repeat the layers of sauce, noodles, ricotta mixture, and mozzarella until all the ingredients are used, finishing with marinara sauce and the remaining mozzarella cheese.
I cover the slow cooker and cook on Low for 4 to 5 hours or on High for 2 to 3 hours, until the noodles are tender and the cheese is melted.
I let the lasagna rest for about 15 minutes before slicing and serving.
I garnish with fresh parsley if I want a fresh finishing touch.

Servings and Timing

Servings: 8
Prep Time: 20 minutes
Cook Time: 4 to 5 hours on Low or 2 to 3 hours on High
Total Time: About 4 hours 20 minutes to 5 hours 20 minutes (Low) or 2 hours 20 minutes to 3 hours 20 minutes (High)

Variations

I add sautéed mushrooms for extra earthy flavor.
I mix cooked Italian sausage or ground turkey into the layers for a heartier meal.
I replace the spinach with kale for a slightly different texture.
I use cottage cheese instead of ricotta for a lighter filling.
I add roasted zucchini or bell peppers for more vegetables.

Storage/Reheating

I store leftover lasagna in an airtight container in the refrigerator for up to 4 days. If I want to freeze it, I cool it completely before placing portions in freezer-safe containers for up to 3 months. I thaw frozen portions overnight in the refrigerator before reheating. I warm individual servings in the microwave or reheat larger portions in a 350°F (175°C) oven until heated through.

FAQs

Can I use frozen spinach instead of fresh?

Yes. I thaw the frozen spinach completely and squeeze out as much excess moisture as possible before adding it to the cheese mixture.

Do I need to cook the lasagna noodles first?

No. I use regular uncooked lasagna noodles because they soften perfectly as they cook in the slow cooker with the sauce.

Can I assemble the lasagna ahead of time?

Yes. I assemble the layers in the slow cooker insert, refrigerate them overnight, and start cooking when I’m ready.

How do I keep the lasagna from becoming watery?

I avoid using overly watery marinara sauce, drain frozen spinach well, and allow the lasagna to rest before serving so it sets properly.

What can I serve with slow cooker spinach lasagna?

I enjoy serving it with garlic bread, Caesar salad, roasted vegetables, or a simple green salad for a complete meal.

Conclusion

I always come back to this slow cooker spinach lasagna because it’s comforting, easy to prepare, and full of cheesy, homemade flavor. The slow cooking process creates tender layers and perfectly melted cheese with minimal effort. Whether I make it for a family dinner, meal prep, or a gathering with friends, it’s a recipe that never disappoints.

Slow Cooker Spinach Lasagna Recipe

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Slow Cooker Spinach Lasagna is a rich, cheesy comfort food layered with tender lasagna noodles, creamy ricotta, fresh spinach, marinara sauce, and melted mozzarella. This easy slow cooker recipe is perfect for family dinners, meal prep, or entertaining with minimal hands-on effort.

Author: Laura
Prep Time: 20 minutes
Cook Time: 4-5 hours
Total Time: 4 hours 20 minutes
Yield: 8 servings
Category: Main Course
Method: Slow Cooker
Cuisine: Italian
Diet: Vegetarian

Instructions

Lightly grease the inside of the slow cooker with olive oil or cooking spray.
In a large bowl, combine the ricotta cheese, egg, Parmesan cheese, chopped spinach, garlic, Italian seasoning, dried basil, salt, and black pepper.
Spread a thin layer of marinara sauce over the bottom of the slow cooker.
Arrange a layer of uncooked lasagna noodles over the sauce, breaking them as needed to fit.
Spread a portion of the ricotta and spinach mixture over the noodles.
Sprinkle with a layer of shredded mozzarella cheese.
Repeat the layers of sauce, noodles, ricotta mixture, and mozzarella until all ingredients are used, finishing with marinara sauce and the remaining mozzarella.
Cover and cook on Low for 4 to 5 hours or on High for 2 to 3 hours, until the noodles are tender and the cheese is melted.
Let the lasagna rest for about 15 minutes before slicing.
Garnish with fresh parsley if desired and serve.

Notes

Use well-drained thawed frozen spinach if fresh spinach is unavailable.
Add sautéed mushrooms, cooked Italian sausage, or ground turkey for extra flavor.
Substitute kale for spinach or cottage cheese for ricotta if preferred.
Add roasted zucchini or bell peppers for additional vegetables.
Assemble the lasagna ahead of time and refrigerate the slow cooker insert overnight before cooking.
Store leftovers in the refrigerator for up to 4 days or freeze for up to 3 months.
Allow the lasagna to rest before serving to help it set and slice cleanly.

Nutrition

Serving Size: 1 slice
Calories: 430 kcal
Sugar: 7 g
Sodium: 780 mg
Fat: 19 g
Saturated Fat: 10 g
Unsaturated Fat: 7 g
Trans Fat: 0 g
Carbohydrates: 40 g
Fiber: 3 g
Protein: 24 g
Cholesterol: 80 mg