Begin by grating the sharp cheddar and Monterey Jack cheeses into a large mixing bowl. Add in the crumbled bacon and diced pickled jalapeños, combining them thoroughly so the flavors meld.

In a separate bowl, whisk together the evaporated milk, all-purpose flour, and eggs until you achieve a smooth batter.

Once your wet ingredients are well blended, pour the mixture over the cheese blend you prepared earlier, and gently stir until everything is evenly coated.

Preheat your oven to 350°F (175°C) and grease a 9x13-inch baking dish. Pour the combined mixture into the dish and bake for 35-40 minutes.

Once baked, remove the dish from the oven and let it cool for about 10 minutes. After cooling, slice them into squares and serve.