This Southern Spinach Madeleine Casserole is pure comfort food, with a creamy, savory sauce and just enough gentle heat to keep each bite interesting. It feels right at home on a Thanksgiving table, yet it is simple enough to make for an ordinary family dinner. I especially like that this classic-style spinach dish uses easy-to-find ingredients and comes together in one saucepan.

The flavor starts with tender chopped spinach and a smooth sauce made from butter, flour, evaporated milk, and reserved spinach cooking water. Velveeta melts into the sauce for a creamy finish, while onion, Worcestershire sauce, celery salt, garlic salt, jalapeno, and red pepper add savory depth and warmth. As a result, the casserole tastes rich and well-seasoned without taking attention away from the rest of the meal.

To make it, cook and drain the spinach, then save half a cup of its cooking water. Next, whisk butter and flour together over low heat, slowly add the milk and spinach water, and stir until smooth and thick. Then add the seasonings and cheese, fold in the spinach, and serve from the pot or transfer it to a casserole dish. The recipe takes 10 minutes to prepare and 20 minutes to cook, for 30 minutes total, and makes 8 servings at about 133 calories per serving.

Because you can prepare it ahead, this Southern Spinach Madeleine Casserole works beautifully for Thanksgiving, potlucks, and holiday dinners. It also makes a cozy side dish on a chilly evening. Add buttered breadcrumbs just before serving if you want a crisp topping.

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Why You’ll Love This Southern Spinach Madeleine Casserole for Thanksgiving

• Quick to prepare: It takes about 30 minutes from start to finish, so it fits into a busy holiday cooking schedule.
• Easy ingredients: Frozen chopped spinach and familiar pantry seasonings make this recipe practical all year.
• Creamy comfort food: Butter, evaporated milk, and Velveeta create a smooth, satisfying sauce.
• A little warmth: Jalapeno and red pepper add a gentle kick, while you can adjust them to suit your taste.
• Make-ahead friendly: Prepare it a day early, refrigerate it, then reheat it when dinner is ready.

Spinach Tips

Frozen chopped spinach is a convenient choice for this casserole because it is already trimmed and cut into small pieces. For best results, cook it according to the package directions, then drain it very well so excess water does not thin the sauce. Be sure to reserve 1/2 cup of the cooking water before draining. If the spinach still seems wet, press it gently in a strainer with the back of a spoon. You can use fresh spinach instead, but you will need enough to yield about 20 ounces of cooked, drained spinach, and the cooking time and amount of reserved liquid may vary.

Options for Substitutions

• Use fresh spinach: Replace the frozen spinach with about 2 to 2 1/2 pounds of fresh spinach, cooked down and drained well. The final amount will shrink considerably.
• Change the cheese: Use cubed American cheese in place of Velveeta for a similar melt. For a sharper flavor, try a mild cheddar, though the sauce may be less silky.
• Swap the evaporated milk: Use whole milk or half-and-half. Add it gradually, since the sauce may need a little less or more liquid to reach the right thickness.
• Use another thickener: Replace the all-purpose flour with a gluten-free all-purpose flour blend. Check that the blend is suitable for thickening sauces.
• Adjust the heat: Leave out the jalapeno and red pepper for a mild dish, or add a little extra jalapeno for more warmth.
• Change the seasonings: If you do not have celery salt or garlic salt, use plain salt and add a small pinch of celery seed or extra garlic powder. Season gradually and taste as you go.

Watch Out for These Mistakes

Do not skip draining the spinach well. Extra liquid can make the sauce thin and watery. Still, save the measured half cup of cooking water before you pour the rest away, since it helps bring flavor to the sauce.

Keep the butter and flour over low heat, and whisk until the mixture looks smooth. If the flour browns, it can change the color and flavor of this creamy casserole. Also, add the evaporated milk and spinach water slowly while stirring to prevent lumps.

Season carefully because celery salt, garlic salt, and Velveeta all add saltiness. Start with a small amount of additional salt, then taste the sauce before adding more. Likewise, add jalapeno and red pepper gradually if you are unsure how much heat your family enjoys.

Finally, stir the cheese until it melts, but avoid boiling the sauce. If you add breadcrumbs, wait until just before serving to top the casserole. That way, they stay crisp instead of soaking up moisture in the refrigerator.

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What to Serve With Southern Spinach Madeleine Casserole for Thanksgiving?

This creamy spinach casserole pairs especially well with roast turkey, baked ham, or roasted chicken. For a classic holiday plate, serve it alongside mashed potatoes and cranberry sauce, or add green beans for another vegetable side. Because the casserole is rich and savory, a bright salad or tart cranberry dish can also bring a refreshing contrast.

Storage Instructions

Store: Let leftovers cool, then place them in an airtight container and refrigerate for 3 to 4 days. For food safety, do not leave the casserole at room temperature for more than two hours.

Freeze: Cool the casserole fully and pack it in a freezer-safe airtight container. Freeze for up to 2 months for best quality. Thaw it overnight in the refrigerator before reheating. The sauce may look a little less smooth after freezing, so stir it well as it warms.

Reheat: On the stovetop, warm the casserole in a saucepan over low heat, stirring often. Add a small splash of milk or water if the sauce seems too thick. In the microwave, heat a serving in a microwave-safe dish in short intervals, stirring between each one, until hot throughout. Add breadcrumbs after reheating if you want them crisp.

Recipe Info

• Preparation Time: 10 minutes
• Cooking Time: 20 minutes
• Total Time: 30 minutes
• Level of Difficulty: Easy
• Servings: 8
• Calories: About 133 kcal per serving

Estimated Nutrition

Estimated nutrition for the whole recipe (without optional ingredients):

These figures are estimates and may vary based on the brands you use and how much added salt you include.

• Calories: 1,000-1,100 kcal
• Protein: 45-55 g
• Fat: 65-75 g
• Carbohydrates: 65-80 g

Ingredients

• 20 oz frozen chopped spinach
• 4 Tbsp butter
• 2 Tbsp all-purpose flour
• 2 Tbsp chopped onion
• 1/2 cup evaporated milk
• 1/2 cup spinach cooking water (reserved from cooking the spinach)
• 1/2 tsp black pepper
• 3/4 tsp celery salt
• 3/4 tsp garlic salt
• Salt, to taste
• 1 tsp Worcestershire sauce
• 4 oz Velveeta cheese, cubed
• 2 tsp minced jalapeno
• Red pepper, to taste

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Step-by-Step Instructions

Step 1: Cook the Spinach and Save the Cooking Water

Cook the frozen chopped spinach according to the package directions. Before draining it, measure and set aside 1/2 cup of the cooking water. Drain the spinach well, then set it aside while you make the sauce.

Step 2: Make the Butter and Flour Base

Melt the butter in a large saucepan over low heat. Whisk in the flour until the mixture is smooth. Keep the heat low and do not let the flour brown. This simple base will help thicken the sauce.

Step 3: Add the Milk and Spinach Water

Slowly pour in the evaporated milk and reserved spinach water while stirring constantly. Continue stirring until the sauce is smooth and thick. Add the liquid gradually to help prevent lumps.

Step 4: Season the Sauce and Melt the Cheese

Stir in the black pepper, celery salt, garlic salt, salt to taste, Worcestershire sauce, minced jalapeno, and red pepper. Then add the cubed Velveeta and stir until it melts into the sauce. Taste and adjust the seasonings as needed.

Step 5: Fold in the Spinach

Add the drained spinach to the sauce and fold it in until it is evenly coated. Keep the heat low and stir gently until the casserole is hot throughout.

Step 6: Serve or Finish With Breadcrumbs

Serve the spinach Madeleine straight from the saucepan, or spoon it into a casserole dish. If you want a crisp topping, add buttered breadcrumbs just before serving. This timing helps keep them crunchy.

Step 7: Chill or Freeze Leftovers

Let leftovers cool, then store them in an airtight container in the refrigerator for 3 to 4 days. You can also make the casserole a day ahead and refrigerate it, or freeze it for later. Reheat gently before serving.

Conclusion

This Southern Spinach Madeleine Casserole brings together tender spinach, a creamy cheese sauce, and a little peppery warmth in an easy side dish. It takes just 30 minutes, serves 8, and can be made ahead for a calmer Thanksgiving meal. Give it a try for your next holiday dinner or family gathering, and share how you served it. If you enjoy comforting vegetable sides, explore more easy casserole recipes for your table.