Cheese-Scalloped Potatoes/Carrots

This scalloped potato casserole adds sliced carrots to the classic formula, which brings a natural sweetness and color that plain potatoes-and-cheese can lack. Everything gets layered with a from-scratch sharp cheddar sauce and baked until golden and bubbly.

The cheese sauce is a straightforward roux-based béchamel. Butter and flour cook together, then milk goes in gradually to build a smooth, thick base. Sharp cheddar melts into it at the end, and a dash of cayenne adds a quiet warmth that makes the cheese flavor pop without any obvious heat.

Par-cooking the potatoes, carrots, and onion for 5 minutes before assembling is a smart move. Raw potatoes in a casserole can take forever to cook through and often stay crunchy in the center. This head start means everything finishes tender at the same time.

Kitchen Tips

• Slice the potatoes thin and uniform. A mandoline makes this fast and consistent. Uneven slices mean some are mushy while others are undercooked.
• Use sharp or extra-sharp cheddar. Mild cheddar melts fine but barely registers flavor-wise in the finished casserole.
• Remove the foil for the last 10 minutes. That uncovered time is what gives you the browned, crispy cheese top that everyone fights over.
• Let the casserole rest 5 to 10 minutes before serving. The sauce thickens as it cools slightly and won’t run all over the plate.

Variations

• Gruyère upgrade: Swap half the cheddar for Gruyère for a nuttier, more complex sauce with better melting properties.
• Ham and potato version: Layer in diced ham between the vegetables for a heartier, one-dish dinner.