Can I make these ahead of time?
Yes. Assemble the crackers with ham and cheese up to 4 hours ahead, cover with plastic wrap, then pour the poppy seed sauce over and bake just before serving.
What type of crackers work best?
Buttery round crackers like Ritz are ideal because they hold up to the sauce and baking without becoming soggy. Avoid thin or delicate crackers.
Can I use a different cheese?
Yes. Cheddar, provolone, or a Swiss-cheddar blend work well. Avoid soft cheeses like brie, which won't hold their shape during baking.
How do I know when they're done?
Bake until the cheese is fully melted and bubbling at the edges, and the sauce is golden brown and starting to crisp on top, about 15-20 minutes.
Can I double this recipe?
Yes. Scale all ingredients proportionally. You may need to use two baking sheets and rotate them halfway through baking for even cooking.