📖 Instructions

1. **Preheat and Prepare**: First things first, go ahead and preheat your oven to a nice, cozy 350°F (175°C). While that's warming up, grab a 9x13 inch baking dish and lightly grease it. You can use cooking spray or a pat of butter, just enough to make sure nothing sticks. This step is super important for easy serving later on.
2. **Combine the Corn**: Now, open up both cans of whole kernel corn. Make sure to drain them really well! You don't want any extra liquid diluting our creamy masterpiece. Pour the drained whole kernel corn into your large mixing bowl. Next, add the can of creamed corn (no draining needed for this one, all that creamy goodness stays!).
3. **Add Dairy and Mix**: To the corn, add your sour cream. Don’t hold back on this; it's key for that luscious texture. Give it a good stir with your spatula or a sturdy spoon until everything looks well combined.
4. **Introduce the Muffin Mix**: Carefully open your Jiffy corn muffin mix box. Pour the entire contents of the mix right into the bowl with the corn and sour cream. Now, gently fold it in. You want to mix it just until the muffin mix is incorporated, but be careful not to overmix! Overmixing can make your casserole dense, and we're aiming for spoon-soft, remember? A few small lumps are totally okay.
5. **Melt the Butter**: In a small, microwave-safe bowl or a small saucepan on the stovetop, melt your stick of butter. It should be fully liquid but not boiling hot.
6. **Incorporate Butter**: Pour the melted butter into your corn mixture. Again, gently fold it in until it's just combined. The butter adds richness and contributes significantly to the casserole’s silky smooth finish.
7. **Transfer to Baking Dish**: Carefully pour the entire mixture into your prepared 9x13 inch baking dish. Use your spatula to spread it out evenly.
8. **Bake to Perfection**: Pop the baking dish into your preheated oven. Bake for about 45-60 minutes. The cooking time can vary a bit depending on your oven, so keep an eye on it. You’ll know it’s ready when the top is beautifully golden brown, and the edges are bubbling. If you gently jiggle the dish, the center should be mostly set, not super liquidy. A knife inserted near the center should come out mostly clean.
9. **Cool and Serve**: Once it’s golden and set, carefully remove the casserole from the oven. It will be very hot! Let it cool on a wire rack for about 10-15 minutes before serving. This cooling period allows the casserole to set up a bit more and makes it easier to scoop. Then, grab a spoon and dig in! This dish is best served warm.