Italian Polenta and Spinach Bake Recipe
Introduction
This Italian Polenta and Spinach Bake is a comforting, cheesy dish perfect for cozy dinners. Creamy polenta layers are combined with flavorful spinach béchamel and melted cheeses for a satisfying meal any night of the week.

Ingredients
- 1 ½ cup polenta (9 oz / 250 g)
- 4 ¼ cups water (34 fl.oz / 1000 ml)
- 1 ½ teaspoon fine sea salt or Kosher
- 2 tablespoons butter
- 3 ½ tablespoons all-purpose flour
- 1 ⅓ cup milk (10 fl.oz / 300 ml)
- 10.5 oz frozen spinach (300 g)
- A few gratings of nutmeg
- Fine sea salt
- 1 mozzarella ball (4.5 oz / 125 g)
- 3.5 oz fontina cheese (100 g)
- 2 oz Parmesan cheese (60 g)
Instructions
- Step 1: Heat the water in a large pot until almost boiling. Add the salt to the water.
- Step 2: Slowly add the polenta to the hot water while whisking continuously. When it starts to bubble, reduce heat to prevent burning and be careful with hot splashes.
- Step 3: Stir briefly to remove lumps. Cover the pot with a crack open and stir every 2-3 minutes. Cook polenta according to package instructions, roughly 15 minutes for medium cornmeal or 40-50 minutes for coarse cornmeal.
- Step 4: Meanwhile, defrost the spinach and squeeze out excess water.
- Step 5: In a saucepan, melt butter then sprinkle flour over it. Cook gently while stirring until lightly golden.
- Step 6: Gradually whisk in the milk and cook until the béchamel sauce thickens, about 1-2 minutes.
- Step 7: Add the drained spinach to the béchamel. Season with nutmeg, salt, and pepper to taste, then combine well.
- Step 8: Preheat oven to 400°F (200°C) and butter a baking dish generously.
- Step 9: Grate the fontina and Parmesan cheeses. Tear the mozzarella into small pieces. Reserve a small portion of fontina and Parmesan for topping.
- Step 10: Spread half the cooked polenta into the baking dish. Layer with the spinach sauce, then sprinkle with most of the grated fontina, Parmesan, and all the mozzarella.
- Step 11: Cover with the remaining polenta and top with the reserved cheese.
- Step 12: Bake for 25-30 minutes until golden and bubbling. Serve immediately.
Tips & Variations
- For extra flavor, try adding a pinch of red chili flakes to the spinach sauce for subtle heat.
- Use fresh spinach if available, sauté it lightly before adding to the béchamel.
- Substitute fontina with provolone or mozzarella for a different cheese profile.
- Make ahead by assembling the bake and refrigerating, then bake just before serving.
Storage
Store leftovers in an airtight container in the refrigerator for up to 3 days. Reheat in a preheated oven at 350°F (175°C) covered with foil for about 15 minutes or until warmed through. Avoid microwaving to keep the texture creamy and the crust crisp.
How to Serve

Serve this delicious recipe with your favorite sides.
FAQs
Can I use fresh polenta instead of the instant kind?
Yes, fresh polenta works well but adjust cooking times according to the package or recipe instructions. It typically requires less cooking time than coarse cornmeal polenta.
Is it possible to make this dish vegan?
You can make a vegan version by using plant-based milk and vegan butter for the béchamel sauce, and replacing the cheeses with vegan alternatives. Keep in mind the texture and flavor may differ slightly.
PrintItalian Polenta and Spinach Bake Recipe
This Italian Polenta and Spinach Bake is a comforting, cheesy casserole featuring creamy polenta layered with a flavorful spinach béchamel sauce and a blend of mozzarella, fontina, and Parmesan cheeses. Slow-cooked polenta is combined with a rich spinach sauce and baked until golden and bubbling, making it a hearty vegetarian dish perfect for a cozy meal.
- Prep Time: 20 minutes
- Cook Time: 50 minutes
- Total Time: 1 hour 10 minutes
- Yield: 6 servings 1x
- Category: Main Course
- Method: Baking
- Cuisine: Italian
- Diet: Vegetarian
Ingredients
Polenta
- 1 ½ cup polenta (9 oz / 250 g)
- 4 ¼ cups water (34 fl.oz / 1000 ml)
- 1 ½ teaspoon fine sea salt or Kosher salt
Spinach Sauce
- 2 tablespoons butter
- 3 ½ tablespoons all-purpose flour
- 1 ⅓ cup milk (10 fl.oz / 300 ml)
- 10.5 oz frozen spinach (300 g), defrosted and well squeezed
- a few gratings of nutmeg
- fine sea salt
- freshly ground black pepper (to taste)
Cheeses
- 1 mozzarella ball (4.5 oz / 125 g), torn into small pieces
- 3.5 oz fontina (100 g), grated
- 2 oz Parmesan (60 g), grated
Instructions
- Heat water: In a large pot, heat 4 ¼ cups (1000 ml) of water until it is almost boiling. Add 1 ½ teaspoons of fine sea salt or Kosher salt to the water.
- Add polenta: Slowly add 1 ½ cups (250 g) of polenta to the hot water while whisking continuously. Be cautious as the polenta starts to bubble; if bubbles become too large, reduce the heat and use mittens to protect yourself from splatters.
- Cook polenta: Once the polenta is fully incorporated, stir briefly to eliminate lumps. Lower the heat, cover the pot leaving a small crack open for steam to escape, and stir every 2-3 minutes with a wooden spoon. Continue cooking according to your polenta type—40 to 50 minutes for coarse cornmeal or about 15 minutes for medium cornmeal.
- Prepare spinach sauce: While the polenta cooks, defrost 10.5 oz (300 g) of frozen spinach and squeeze out excess water.
- Make béchamel sauce: In a medium saucepan, melt 2 tablespoons of butter. Sprinkle 3 ½ tablespoons all-purpose flour over the butter and cook gently while stirring until it turns lightly golden. Gradually whisk in 1 ⅓ cups (300 ml) of milk to prevent lumps. Let it simmer gently for 1-2 minutes until thickened.
- Add spinach: Incorporate the squeezed spinach into the béchamel sauce. Season with nutmeg, salt, and freshly ground black pepper to taste, mixing well.
- Preheat oven and prepare dish: Preheat your oven to 400°F (200°C). Generously butter a baking dish.
- Prepare cheeses: Grate 3.5 oz (100 g) fontina and 2 oz (60 g) Parmesan cheese. Tear 1 mozzarella ball (125 g) into small pieces. Reserve 2 tablespoons fontina and about one-third of the Parmesan for topping.
- Assemble the bake: Spread half of the cooked polenta evenly in the buttered baking dish. Layer the spinach sauce over the polenta. Sprinkle the grated fontina and Parmesan (except reserved amounts) along with the torn mozzarella pieces on top of the spinach sauce. Cover with the remaining polenta, then sprinkle with the reserved cheeses for a golden crust.
- Bake: Place the assembled dish in the preheated oven and bake for 25–30 minutes, or until the top is golden brown and bubbly. Serve immediately while hot and creamy.
Notes
- Use coarse or medium cornmeal polenta depending on desired texture; cooking time will vary accordingly.
- Remove as much water as possible from defrosted spinach to avoid a watery sauce.
- Fontina can be substituted with other melting cheeses like Gruyère for a different flavor profile.
- Wear oven mitts when stirring polenta as it can bubble strongly and cause burns.
- This dish can be made ahead and reheated; just add a few minutes to baking time if coming from the fridge.
Keywords: polenta bake, spinach bake, Italian casserole, vegetarian Italian recipe, cheesy polenta, baked polenta spinach

