Preheat the oven: Set your oven to 350° F (180° C). This is the perfect temperature to get that golden brown crust on your cornbread.
Prepare your baking dish: Grab and lightly grease it. This will prevent your delicious cornbread from sticking to the dish.
Mix your dry ingredients: In your large mixing bowl, combine yellow cornmeal, all-purpose flour, granulated sugar, baking powder, cayenne pepper, and sea salt. Whisk them together until they're well combined.
Add your wet ingredients. Add milk and whisked eggs into the dry ingredients and combine well.
Slowly add your melted butter. To avoid your melted butter solidifying, slowly add it to your mixture while mixing (it helps if you have a little helper like we did)
Add the corn, Jalapeños, and cheese. Add corn kernels and shredded cheddar cheese to your dry mixture. Stir them in until they're evenly distributed, and don't forget to put some aside to use as toppings for your cornbread. Use a folding action with the whisk to avoid overworking your mix.
Pour and bake: Pour your batter into the prepared baking dish. Pop it in the oven and bake for 30-35 minutes. You'll know it's done when the top is golden, and a toothpick inserted into the center comes out clean.
Cool and serve: Let your cornbread cool before slicing it. Serve it warm with a generous slathering of butter, and enjoy!