Can I make jalapeño cheese squares ahead of time?
Yes. Assemble the mixture in the baking pan, cover, and refrigerate up to 24 hours before baking. Add 2–3 minutes to bake time if baking from cold.
How do I know when jalapeño cheese squares are done?
Bake until the top is golden brown and the edges are set and bubbling, typically 25–30 minutes at 350°F. A toothpick inserted in the center should come out clean or with just a few moist crumbs.
Can I use fresh jalapeños instead of canned?
Yes. Use about 4–5 fresh jalapeños, seeded and diced. Fresh jalapeños release more moisture, so drain them well or pat dry before mixing to avoid a wet filling.
What if I don't have evaporated milk?
Substitute with heavy cream or a mixture of whole milk and a small amount of cream cheese, whisked smooth. Use the same volume (1 cup).
How should I store leftovers?
Store covered in the refrigerator for up to 3 days. Reheat in a 350°F oven for 10–12 minutes until warmed through.