Preheat your oven to 325F. Make sure to have the rack positioned in the middle position and removing any rack over it so that your ham can fit.
Combine in a small bowl, the brown sugar, maple syrup, Dijon mustard, and orange zest. Whisk the ingredients until smooth and set aside.
½ cup Maple Syrup , ½ cup Brown Sugar , 2 tablespoon Dijon Mustard, 1 large Orange
Remove the smoked ham from its packaging. Remember to read any instructions given on the package of your particular ham. Use a sharp knife to gently remove any extra rind that might be present on the ham, trying to leave the fat layer and meat intact.
1 10 LB fully cooked, bone in ham (butt portion)
Place the ham butt flat side down, into a large enough baking dish. Notice that I used a 9"x13" baking dish, but you can use a small roaster with a lid.
Use a sharp knife to make shallow cuts (about ¼ inch deep) in the fat of the ham, creating a diamond or crisscross pattern all around the ham. Brush half of the glaze all over the ham butt.
If using a baking dish, wrap the dish, over the ham, tightly with foil. Alternatively, place the lid on the roaster pan. Place the glazed ham in the preheated 325F oven. Cook until 30-40 minutes prior to the calculated cooking time for the size of your ham, see notes.
Remove foil from the ham 40 minutes before the end of the cooking time. Turn the oven temperature up to 400F.
Brush on the other half of the glazing mixture. Return the ham, uncovered, for 30-40 minutes, basting the ham half way through.
Remove the Maple Orange Glazed Ham from the oven. Baste the ham as it comes out of the oven. Squeeze the juice from the zested orange over the cooked ham for a burst of citrus flavor. Let the ham rest for 15-20 minutes before slicing into it.