📖 Instructions

1. Preheat your oven to a cozy 350°F (175°C). While the oven is warming up, grab a standard 9x13-inch baking dish. You don't need to grease it because the casserole has plenty of butter, but if you're extra cautious, a light spray of cooking oil won't hurt.
2. In a really large mixing bowl—you want enough space for everything to combine without a mess!—add your two cans of whole kernel corn. Make sure you drain these well; we want creamy, not watery, casserole. Next, spoon in the two cans of creamed corn; these are the secret to that lovely soft texture!
3. Now for the good stuff: gently melt a stick (that's 1/2 cup) of unsalted butter. You can do this in the microwave in short bursts, or on the stovetop over low heat. Once it’s liquid gold, pour it into the bowl with the corn.
4. Add one 8-ounce container of sour cream to the mix. This is where a lot of the tang and richness comes from. Don’t skimp on this part!
5. Next, sprinkle in the 1/2 cup of granulated sugar. Yes, sugar! It balances the savory notes of the corn and adds to that comforting, slightly sweet flavor profile. Then, add the 1/4 cup of all-purpose flour; this helps thicken the casserole just a touch and binds everything together beautifully.
6. Using a large spoon or a spatula, gently fold all the ingredients together. Mix just until everything is combined and you don't see any streaks of flour or unmixed sour cream. Be careful not to overmix, as that can sometimes make it a little tough.
7. Pour the wonderfully combined corn mixture into your prepared 9x13-inch baking dish. Use your spatula to spread it evenly so it bakes consistently.
8. Place the baking dish carefully into your preheated oven. Let it bake for about 45-60 minutes. The casserole should be beautifully golden brown around the edges and set in the center. A good visual cue is to gently jiggle the dish; if it looks mostly firm with just a slight wobble in the very middle, it’s probably ready.
9. Once it’s golden and bubbly, carefully remove the casserole from the oven. I know it smells amazing and you want to dig in right away, but resist! Let it rest on a cooling rack for at least 10-15 minutes. This resting period allows the casserole to set further and makes for that perfect spoon-soft texture.
10. Serve warm! This casserole is fantastic alongside almost anything. Enjoy the compliments, you earned 'em!
11. If you have any leftovers (a big IF!), cover the dish tightly with plastic wrap or aluminum foil and store it in the refrigerator for up to 3-4 days. Reheat gently in the microwave or oven until warmed through.