Prep Ingredients: Grate the sharp cheddar and Monterey Jack cheese, and transfer them to a large bowl. Toss in the crumbled bacon and diced pickled jalapeños, mixing well to ensure even distribution.

Mix Wet Ingredients: In a separate bowl, whisk together the evaporated milk, all-purpose flour, and eggs until smooth.

Combine Mixtures: Gently fold the wet mixture into the cheese blend until everything is well-coated.

Bake: Preheat your oven to 350°F (175°C). Grease a 9x13-inch baking dish, pour in the mixture, and spread it evenly. Bake for 35-40 minutes until golden and a toothpick comes out clean.

Cool & Serve: Let the cozy squares cool for about 10 minutes before slicing and serving warm.