Grilled Ham and Cheese with Caramelized Onion Jam

Pro tips

• Spread the melted butter evenly on the outside of both bread slices before griddling to ensure even browning and crispness.
• Layer the caramelized onion jam and mustard on the inside of the bread before griddling so the cheese melts around them for better adhesion.
• Cook over medium (not high) heat for 3–4 minutes per side so the cheese melts completely while the bread browns without burning.
• Press gently with a spatula midway through cooking to ensure even contact between the bread and the hot surface.

Substitutions

• Dijon mustard → whole grain mustard or yellow mustard (changes sharpness; yellow will be milder)
• Caramelized onion jam → Fig jam or peach jam (shifts flavor profile to fruity-savory)
• Cheddar and Monterey Jack → Gruyère, Swiss, or American cheese (affects melt quality and flavor depth)
• Thick-cut white bread → Brioche or sourdough (changes texture and flavor; brioche will be richer, sourdough more tangy)

Storage & make-ahead

This sandwich is best served immediately after cooking. Leftover caramelized onion jam keeps refrigerated for up to 1 week.

Equipment

griddle or large skillet · spatula

Can I make the caramelized onion jam ahead?

Yes. Make it 1–2 days in advance and store in an airtight container in the refrigerator. Warm gently before assembling the sandwich.

What cheese blend works best for this sandwich?

Cheddar and Monterey Jack melt evenly and add sharpness. Gruyère or Swiss also work well for a nuttier flavor.

How much butter should I use to cook the sandwich?

Use the full 4 tablespoons melted butter (as specified) for a golden, crispy exterior. This sandwich is meant to be richly buttered.

Can I use thin-sliced bread instead of thick-cut?

Thin bread will absorb butter and fillings unevenly and may tear. Thick-cut bread (at least ½-inch) holds up to the butter and toppings.

Should I toast the bread first or butter it raw?

Butter the bread raw on the outside, then cook it in a skillet or griddle over medium heat until golden and crispy.