M: I want to make au gratin potatoes with fresh potatoes but using the sauce from a 4.7 oz box of Betty Crocker mix.

G: To use the sauce from the Betty Crocker au gratin potatoes mix with fresh potatoes:

  1. Prepare the Potatoes:

    • Peel and thinly slice 2–3 medium fresh potatoes (about 1.5 lbs). Try to keep the slices uniform for even cooking.

  2. Preheat the Oven:

    • Set it to 400°F (200°C).

  3. Prepare the Sauce:

    • Follow the box instructions to make the sauce, typically mixing the sauce packet with water, milk, and butter as directed. Do not add the dried potatoes from the box.

  4. Assemble the Dish:

    • Layer the fresh potato slices in a greased baking dish.
    • Pour the prepared sauce evenly over the potatoes, ensuring they're coated.

  5. Bake:

    • Cover the dish with foil and bake for 30–40 minutes.
    • Remove the foil and bake for an additional 15–20 minutes, or until the potatoes are tender and the top is golden and bubbling.

  6. Cool Slightly:

    • Let it sit for 5–10 minutes before serving.

This method ensures the sauce melds well with the fresh potatoes.