This is a dish my grandma prepared when I was young, and it remains delicious even now!

This Oven Baked Cheesy Corn and Spinach Casserole is a vibrant, vegetable-forward side dish that uses a simple savory custard to bind the ingredients into a light, souffle-like texture. By whisking eggs, milk, and a small amount of flour, you create a structural base that suspends the corn kernels and fresh spinach evenly throughout the dish. The cheddar cheese provides a salty, melted crust that complements the natural sweetness of the corn, delivering a colorful and balanced casserole that is as nutritious as it is comforting.

Oven Baked Cheesy Corn and Spinach Casserole

Ingredients:

Step-by-Step Directions:

Step 1: The Custard Base: Preheat your oven to 375°F. Grease a medium baking dish with butter. In a large bowl, whisk together the eggs, milk, flour, garlic powder, salt, and pepper until the mixture is smooth and the flour is fully incorporated.

Tip: Whisking the flour into the liquid before adding the vegetables is a vital mechanical step. This prevents flour “clumps” from forming and ensures the starch is evenly distributed to thicken the custard into a stable, sliceable consistency.

Step 2: The Vegetable Fold: Stir the drained corn, fresh spinach, and 1/2 cup of the cheddar cheese into the egg mixture.

The Spinach Rule: Don’t worry if the fresh spinach looks bulky; it will wilt significantly during the bake, releasing its moisture into the custard and intensifying its flavor.

Step 3: The Assembly: Pour the mixture into the prepared dish and spread it into an even layer. Sprinkle the remaining 1/2 cup of cheese over the top to create a golden, protective crust.

Step 4: The Golden Bake: Bake for 30/35 minutes.

The Visual Cue: You are looking for a casserole that is “set” (no longer jiggly in the center) with a top that is bubbly and deeply golden brown.

Step 5: The Brief Rest: Let the casserole cool for 5 minutes before serving.

Tip: This rest period is a “structural” necessity. As the eggs cool slightly, the protein network firms up, allowing you to scoop out clean portions that hold their shape on the plate.