Preheat the oven to 350°F. Coat a 9×13-inch baking pan with nonstick cooking spray or grease with butter. Set aside.
To a large blender, add 3 ¾ cups of the corn kernels, eggs, sweetened condensed milk, butter, milk, flour, baking powder, vanilla extract, and salt. Blend until mostly smooth.
Add the remaining ¼ cup of corn kernels and give the batter one last pulse to combine.
Pour the wet batter into the prepared baking pan and bake for 35-40 minutes, or until golden brown.
Remove from oven and let cool for 30 minutes before serving.