Baked Ham Ingredients 1 (10-lb.) boneless or bone-in cooked whole ham 1 1/2 c. apple cider 1/2 c. packed brown sugar 1/4 c. Dijon mustard 1 tbsp. apple cider vinegar Directions Step 1Preheat oven to 325º. Place ham on a rack set in a roasting pan. Using a sharp knife, score outside of ham in a crosshatch pattern, spacing about 1/2" apart. Cover with foil and bake until warmed through, 2 1/2 to 3 hours. Step 2During the last 45 minutes of cooking, in a small saucepan over medium heat, whisk apple cider, brown sugar, mustard, and vinegar. Bring to a boil, then reduce heat to medium-low and bring to a simmer. Cook, stirring occasionally, until reduced by about half, 10 to 15 minutes. Step 3Uncover ham. Continue to bake, brushing glaze on ham every 15 minutes, until an instant-read thermometer inserted into thickest part of ham registers 140°, about 45 minutes more. Step 4Brush wit...